compiled by Alaskan Branch from all available authentic sources, chiefly from maps of the U.S. Geological Survey and the U.S. Coast and Geodetic Su... Geological Survey.
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Geological Survey (U.S.). A.F. Hassan, Cartographer. "Compiled in 1921 and 1922. Compilation based on state map by the General Land Office." "North American datum.". Geological Survey.
1952. Moran, W. H.(William H.), cartographer. January, 1952.; Black line print.; Traced from Map of Indiana, edition of 1950, published by U.S. Geological Survey. Minor revisions and additions ... Geological Survey.
prepared and reproduced in the United States Department of the Interior, Geological Survey for the War Department, Office of the Assistant Chief of... Geological Survey.