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Aerial Photographic Map of Baltimore and Metropolitan District of Baltimore County [COMPLETE SET]
(Baltimore: Chesapeake Aircraft Co., 1927)
Scale: 1 inch equals 400 feet. Area covered 210 square miles. Period of flying; October 19, 1926 - February 24, 1927.
Aerial Photographic Map of Baltimore and Metropolitan District of Baltimore County. [INCOMPLETE SET]
(Baltimore: Chesapeake Aircraft Co., 1927)
Scale: 1 inch equals 400 feet. Area covered 210 square miles. Period of flying; October 19, 1926 - February 24, 1927.