APA (7th ed.) Citation

(1925). Map of Baltimore county and Baltimore city showing the geological formations. Maryland Geological Survey.

Chicago Style (17th ed.) Citation

Map of Baltimore County and Baltimore City Showing the Geological Formations. [Baltimore]: Maryland Geological Survey, 1925.

MLA (9th ed.) Citation

Map of Baltimore County and Baltimore City Showing the Geological Formations. Maryland Geological Survey, 1925.

Warning: These citations may not always be 100% accurate.