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MLA
Great Britain. War Office. General Staff. Geographical Section. (Cartographer). Portugal 1:50,000. Series 4145. [Ferreira do Zezere, Sheet 23-D] - University of Texas Libraries Collections. 1942. https://collections.lib.utexas.edu/catalog/utlmaps:4a25e741-f219-4308-81fb-aadda057bc47APA
Great Britain. War Office. General Staff. Geographical Section. (Cartographer). (1942). Portugal 1:50,000. Series 4145. [Ferreira do Zezere, Sheet 23-D]. Retrieved March 20, 2025, from https://collections.lib.utexas.edu/catalog/utlmaps:4a25e741-f219-4308-81fb-aadda057bc47Chicago
Great Britain. War Office. General Staff. Geographical Section. (Cartographer). Portugal 1:50,000. Series 4145. [Ferreira do Zezere, Sheet 23-D]. 1942. "Portugal 1:50,000. Series 4145. [Ferreira do Zezere, Sheet 23-D] – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlmaps:4a25e741-f219-4308-81fb-aadda057bc47> (20-March-2025).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.