Cite

Skeleton map of Russia and northern Asia [cartographic material].

MLA

Division, Great Britain. War Office. Intelligence. Skeleton Map of Russia and Northern Asia [Cartographic Material]. Litho'd at the Intell. Div. War Office, 0AD. https://collections.library.yale.edu/catalog/15238146.

APA, 6th edition

Division, G. B. W. O. I. (0 C.E.). Skeleton map of Russia and northern Asia [cartographic material]. [Maps]. Litho'd at the Intell. Div. War Office, https://collections.library.yale.edu/catalog/15238146.