Cite

United States contour map / U.S. Geological Survey ; compiled by Henry Gannett.

MLA

Gannett, Henry, 1846-1914. United States contour map / U.S. Geological Survey ; compiled by Henry Gannett.. BRBL_00417. [1904]. https://collections.library.yale.edu/catalog/15827792.

APA, 6th edition

Gannett, Henry, 1846-1914. (["BRBL_00417"])([1904])[United States contour map / U.S. Geological Survey ; compiled by Henry Gannett.]. https://collections.library.yale.edu/catalog/15827792.