TY  - BOOK
AU  - Stevenson,John James
TI  - Report of progress in the Fayette & Westmoveland district of the bituminous coald-fields of western Pennsylvania / 
T2  - Second Geological Survey of Pennsylvania
PY  - 1877///-1878
CY  - Harrisburg : 
PB  - The board of Commissioners, 
KW  - Geología-
KW  - Pennsylvania
N1  - Contiene : Part I. Eastern Allegheny County and Fayette and Westmoreland Countles west from Chestnut Ridge -- Part II. The ligonier Valley
ER  -