MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Japan : Ports of Greatest Shipping Activity (Entrances and Clearances of Vessels in Gross Tons) 1934. Reproduction Branch, OSS, 1945. https://collections.library.yale.edu/catalog/15511602.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1945). Japan : ports of greatest shipping activity (entrances and clearances of vessels in gross tons) 1934. [Maps]. Reproduction Branch, OSS, https://collections.library.yale.edu/catalog/15511602.