1. Avalanche handbook / Ronald I. Perla and M. Martinelli, Jr. Perla, Ronald I. [Washington] : U.S. Dept. of Agriculture, Forest Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976. Book Physical Lewis Library QC929.A8xP4 Loading...
2. Silvics of forest trees of the United States / prepared by the Division of Timber Management Research, Forest Service ; compiled and rev. by H.A. Fowells. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1965. Book Physical Lewis Library 86512.921 Loading...