Cite

Major trade areas and trade centers in part of Northwestern Germany.

MLA

Major Trade Areas and Trade Centers in Part of Northwestern Germany. Office of Strategic Services, 1945. https://collections.library.yale.edu/catalog/15483016.

APA, 6th edition

Major trade areas and trade centers in part of Northwestern Germany. (1945). [Maps]. Office of Strategic Services, https://collections.library.yale.edu/catalog/15483016.