You searched for: Subject Geological maps Remove constraint Subject: Geological maps Collection University of Maryland Digital Collections Remove constraint Collection: University of Maryland Digital Collections Place Allegheny County, Pennsylvania, United States Remove constraint Place: Allegheny County, Pennsylvania, United States
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...