MLA

Graham, J. D. (James Duncan), 1799-1865. Three maps referred to in Graham's report to the Secretary of the Interior, Senate Ex. Doc. 121, 32nd Congress, 1st session. Box 44, folder 773. 1851. https://collections.library.yale.edu/catalog/2001598.

APA, 6th edition

Graham, J. D. (James Duncan), 1799-1865. (["Box 44, folder 773"])(1851)[Three maps referred to in Graham's report to the Secretary of the Interior, Senate Ex. Doc. 121, 32nd Congress, 1st session]. https://collections.library.yale.edu/catalog/2001598.