Baltimore City Maps 1900 to 1929
Historic Map Collections of the JHU Sheridan Libraries
The Geography of Baltimore City: Sources
Baltimore City Archives
Baltimore: Research Resources
Sheridan Libraries, Johns Hopkins University
PP30, Hughes Studio Photograph Collection, 1940-1956
Maryland Historical Society Library
[Please note: MDHS is in the process of redesigning their website, so this URL may change]
PP8, Hughes Collection, 1910-1946
Maryland Historical Society Library
[Please note: MDHS is in the process of redesigning their website, so this URL may change]