Cite

Austria Hungary, Scale 1:3,000,000.

MLA

Austria Hungary, Scale 1:3,000,000. s.n., 1919. https://collections.library.yale.edu/catalog/15238169.

APA, 6th edition

Austria Hungary, Scale 1:3,000,000. (1919). [Europe, Eastern--Maps, Maps]. s.n., https://collections.library.yale.edu/catalog/15238169.