Anderson, S., and Edward Weller. <i>Map of the North West Territory: Illustrating the British and United States Boundary Line. Surveyed and Marked Out by the Joint Commission, 1872-3-4. To Accompany the Paper by Captn. Anderson R.E. / [engraved By] Edwd. Weller, F.R.G.S.</i> London: John Murray, 1876.