Cite

Jeppesen's Colorado wonderland map / [Jeppesen Map Co.].

MLA

Co, Jeppesen Map. Jeppesen's Colorado Wonderland Map / [Jeppesen Map Co.]. The Co., 1950. https://collections.library.yale.edu/catalog/15818448.

APA, 6th edition

Co, J. M. (1950). Jeppesen's Colorado wonderland map / [Jeppesen Map Co.]. [Maps]. The Co., https://collections.library.yale.edu/catalog/15818448.