41. Water withdrawals and trends from the Floridan aquifer system in the southeastern United States, 1950-2000 / by Richard L. Marella and Marian P. Berndt. U.S. Geological Survey circular ; 1278. Marella, Richard L. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 2005. Book Online
42. Celebrating 125 years of the U.S. Geological Survey / compiled by Kathleen Gohn. U.S. Geological Survey circular ; 1274. Geological Survey (U.S.) Reston, VA : U.S. Dept. of the Interior, U.S. Geological Survey, 2004. Book Online
43. Geology of the National Capital Region : field trip guidebook / edited by Scott Southworth and William Burton. U.S. Geological Survey circular ; 1264. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2004. Book Online
44. Snakeheads (Pisces, Channidae) : a biological synopsis and risk assessment / by Walter R. Courtenay, Jr. and James D. Williams. U.S. Geological Survey circular ; 1251. Courtenay, Walter R. [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
45. The tufas of Pyramid Lake, Nevada / by Larry Benson. U.S. Geological Survey circular ; 1267. Benson, Larry V. Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
46. Water quality in the Great and Little Miami River Basins, Ohio and Indiana, 1999-2001 / by Gary L. Rowe, Jr. [and five others]. U.S. Geological Survey circular ; 1229. Rowe, Gary L. Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
47. Water quality in the northern Rockies intermontane basins, Idaho, Montana, and Washington, 1999-2001 / by Gregory M. Clark [and five others]. U.S. Geological Survey circular ; 1235. Clark, G. M. (Gregory M.), 1958- [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
48. Water quality in the Santa Ana Basin, California, 1999-2001 / by Kenneth Belitz [and five others]. U.S. Geological Survey circular ; 1238. Belitz, Kenneth Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
49. Water quality in the Yellowstone River Basin, Wyoming, Montana, and North Dakota, 1999-2001 / by David A. Peterson [and five others]. U.S. Geological Survey circular ; 1234., U.S. Geological Survey Circular ; 1234 Peterson, David A. (David Allen), 1955- Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2004. Book Online
50. Evolving issues and practices in managing ground-water resources : case studies on the role of science / by Devin L. Galloway [and four others]. U.S. Geological Survey circular ; 1247. Galloway, Devin L. Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey, 2003. Book Online
51. Geologic studies of mercury by the U.S. Geological Survey / edited by John E. Gray. U.S. Geological Survey circular ; 1248. Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2003. Book Online
52. Large floods in the United States : where they happen and why / Jim E. O'Connor and John E. Costa. U.S. Geological Survey circular ; 1245. O'Connor, Jim E., 1959- [Portland, Or.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 2003. Book Online
53. Lewis and Clark's observations and measurements of geomorphology and hydrology, and changes with time / John A. Moody, Robert H. Meade, David R. Jones. U.S. Geological Survey circular ; 1246. Moody, John A. (John Alexander), 1944- Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2003. Book Online
54. Sustainable growth in America's heartland : 3-D geologic maps as the foundation / by the Central Great Lakes Geologic Mapping Coalition. U.S. Geological Survey circular ; 1190. Central Great Lakes Geologic Mapping Coalition [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2003.[Washington, D.C.] : United States Government Printing Office, [2003] Book Online
55. Assessing ground-water vulnerability to contamination : providing scientifically defensible information for decision makers / by Michael J. Focazio [and three others]. U.S. Geological Survey circular ; 1224. Focazio, Michael J. Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2002. Book Online
56. Ground-water resources of the Middle Rio Grande Basin, New Mexico / by James R. Bartolino and James C. Cole. U.S. Geological Survey circular ; 1222. Bartolino, James R. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002. Book Online
57. Proceedings of the Federal Interagency Workshop on Turbidity and Other Sediment Surrogates, April 30-May 2, 2002, Reno, Nevada / edited by John R. Gray and G. Douglas Glysson ; sponsored by the Federal Interagency Subcommittee on Sedimentation. U.S. Geological Survey circular ; 1250. Federal Interagency Workshop on Turbidity and Other Sediment Surrogates (2002 : Reno, Nev.) Reston, Va. : U.S. Geological Survey, 2003. Book Online
58. The U.S. Geological Survey and the Chesapeake Bay : the role of science in environmental restoration / edited by Scott W. Phillips. U.S. Geological Survey circular ; 1220. Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey, 2001.Washington, D.C. : Government Printing Office, 2002. Book Online
59. Water quality in the Connecticut, Housatonic, and Thames River basins, Connecticut, Massachusetts, New Hampshire, New York, and Vermont, 1992-95 / by S.P. Garabedian [and four others]. U.S. Geological Survey circular ; 1155. Garabedian, Stephen P. [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2001. Book Online
60. Dams and rivers : a primer on the downstream effects of dams / by Michael Collier, Robert H. Webb, and John C. Schmidt. U.S. Geological Survey circular ; 1126. Collier, Michael, 1950- [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2000. Book Online