Topographic instructions of the United States Geological Survey
Book digitized by Google from the library of the New York Public Library and uploaded to the Internet Archive by user tpb. At head of title: Department of the interior A. Administration, by H. M. Frye.--B. Triangulation, comp. by E. M. Douglas.--C. Transit traverse, comp. by E. M. Douglas.--D. Levelling, comp. by E. M. Douglas.--E. Topographic mapping, by W. M. Beaman.--F. Map compilation from aerial photographs, by T. P. Pendleton
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