Cite

"Greater" Germany, density of total population by Kreise or similar units excluding cities 10,000 and over

MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. "Greater" Germany, Density of Total Population by Kreise or Similar Units Excluding Cities 10,000 and Over. R & A, OSS, 1945. https://collections.library.yale.edu/catalog/15479625.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1945). "Greater" Germany, density of total population by Kreise or similar units excluding cities 10,000 and over [Maps]. R & A, OSS. https://collections.library.yale.edu/catalog/15479625.