Cite

Middle Danube area [cartographic material] : soil map / compiled and drawn by I.S.T.D.

MLA

Middle Danube Area [Cartographic Material] : Soil Map / Compiled and Drawn by I.S.T.D. War Office, 1944. https://collections.library.yale.edu/catalog/15498772.

APA, 6th edition

Middle Danube area [cartographic material] : soil map / compiled and drawn by I.S.T.D. (1944). [Maps]. War Office, https://collections.library.yale.edu/catalog/15498772.