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Geological maps
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Maryland
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1. Map b of Baltimore and Harford counties
1839. Weber, Edward. Illustrated map of Baltimore and Harford counties, 1839. Map includes some geological information regarding the Chesapeake Bay shores. 49.3 x 34.6 ...
2. Map illustrative of Allegany and Washington counties
1840. Weber, Edward. Illustrative map of Allegany and Washington counties,1840. Includes a geological profile of the Cumberland and National roads. 46 x 20.1 cm; 1 imag...