United States. Federal Board of Surveys and Maps & Geological Survey (U.S.). (1932). Standard symbols: Adopted by the Board of Surveys and Maps United States of America (Ed. of 1932.). U.S. Geological Survey.
Chicago Style (17th ed.) CitationUnited States. Federal Board of Surveys and Maps and Geological Survey (U.S.). Standard Symbols: Adopted by the Board of Surveys and Maps United States of America. Ed. of 1932. [Washington, D.C.]: U.S. Geological Survey, 1932.
MLA (9th ed.) CitationUnited States. Federal Board of Surveys and Maps and Geological Survey (U.S.). Standard Symbols: Adopted by the Board of Surveys and Maps United States of America. Ed. of 1932. U.S. Geological Survey, 1932.
Warning: These citations may not always be 100% accurate.