Cite

Topographic map of Lower Matanuska Valley, Alaska / Department of the Interior, U.S. Geological Survey.

MLA

Geological Survey (U.S.). Topographic map of Lower Matanuska Valley, Alaska / Department of the Interior, U.S. Geological Survey.. BRBL_00634. 1918. https://collections.library.yale.edu/catalog/15821764.

APA, 6th edition

Geological Survey (U.S.). (["BRBL_00634"])(1918)[Topographic map of Lower Matanuska Valley, Alaska / Department of the Interior, U.S. Geological Survey.]. https://collections.library.yale.edu/catalog/15821764.