MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Steel Manufacture, Iron Ore, and Coal in Europe : Excluding Great Britain and Russia / R & A, OSS. R & A, OSS, 1944. https://collections.library.yale.edu/catalog/15259180.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1944). Steel manufacture, iron ore, and coal in Europe : excluding Great Britain and Russia / R & A, OSS. [Maps]. R & A, OSS, https://collections.library.yale.edu/catalog/15259180.