Alaska / compiled from the official records of the General Land Office, U.S. Coast and Geodetic Survey, Geological Survey, Canadian and other sources, under the direction of Frank Bond ; compiled by M. Hendges ; revised and drawn by Charles J. Helm.
MLA
Helm, Charles J. Alaska / Compiled from the Official Records of the General Land Office, U.S. Coast and Geodetic Survey, Geological Survey, Canadian and Other Sources, under the Direction of Frank Bond ; Compiled by M. Hendges ; Revised and Drawn by Charles J. Helm. General Land Office, 1906. https://collections.library.yale.edu/catalog/15821722.
APA, 6th edition
Helm, C. J. (1906). Alaska / compiled from the official records of the General Land Office, U.S. Coast and Geodetic Survey, Geological Survey, Canadian and other sources, under the direction of Frank Bond ; compiled by M. Hendges ; revised and drawn by Charles J. Helm. [Topographic maps]. General Land Office, https://collections.library.yale.edu/catalog/15821722.
