MLA

Geological Survey (U.S.). Wyoming, Bald Mountain quadrangle : land classification and density of standing timber / U.S. Geological Survey ; E.M. Douglas, geographer in charge ; triangulation by W.S. Post ; topography by Frank Tweedy ; Henry Gannett, geographer in charge ; land cla. BRBL_00586. [1900].. https://collections.library.yale.edu/catalog/15818392.

APA, 6th edition

Geological Survey (U.S.). (["BRBL_00586"])([1900].)[Wyoming, Bald Mountain quadrangle : land classification and density of standing timber / U.S. Geological Survey ; E.M. Douglas, geographer in charge ; triangulation by W.S. Post ; topography by Frank Tweedy ; Henry Gannett, geographer in charge ; land cla]. https://collections.library.yale.edu/catalog/15818392.