Cite

Map of the United States exhibiting the present status of knowledge relating to the areal distribution of geologic groups : (preliminary compilation) / compiled by W.J. McGee.

MLA

McGee, W. J., 1853-1912. Map of the United States exhibiting the present status of knowledge relating to the areal distribution of geologic groups : (preliminary compilation) / compiled by W.J. McGee.. BRBL_00407A. 1884. https://collections.library.yale.edu/catalog/15603696.

APA, 6th edition

McGee, W. J., 1853-1912. (["BRBL_00407A"])(1884)[Map of the United States exhibiting the present status of knowledge relating to the areal distribution of geologic groups : (preliminary compilation) / compiled by W.J. McGee.]. https://collections.library.yale.edu/catalog/15603696.