Geological Survey, United States. Congress. Senate, & U.S. Coast and Geodetic Survey. (1899). Map of Alaska: Showing explorations by U.S. Geological Survey in 1898, together with principal previous routes of exploration. The Survey.
Chicago Style (17th ed.) CitationGeological Survey, United States. Congress. Senate, and U.S. Coast and Geodetic Survey. Map of Alaska: Showing Explorations by U.S. Geological Survey in 1898, Together with Principal Previous Routes of Exploration. [Washington, D.C.]: The Survey, 1899.
MLA (8th ed.) CitationGeological Survey, et al. Map of Alaska: Showing Explorations by U.S. Geological Survey in 1898, Together with Principal Previous Routes of Exploration. The Survey, 1899.
Warning: These citations may not always be 100% accurate.