Cover image for Map of the gas coal region of Pennsylvania and representing the Ocean Mines and their connections.
Title:
Map of the gas coal region of Pennsylvania and representing the Ocean Mines and their connections.
Publication Information:
[New York?] : Julius Bien, Photo-lith., 1878.
Physical Description:
1 map.
General Note:
Inset: Sectional map of Westmorland and Allegheny Counties representing the Youghiagheny gas coal region.
Language:
English
Geographic Term: