Pennsylvania Interstate 80 Geologic Guide William H. Bolles Published: 1975 Total Pages: 36 Get eBook
Annotated Bibliography of Geologic Field Trip Guidebooks of Pennsylvania to 1977 Published: 1978 Total Pages: 42 Get eBook
Annotated Bibliography of Pennsylvania Geology Sandra Blust Published: 1986 Total Pages: 568 Get eBook
Union List of Geologic Field Trip Guidebooks of North America Richard A. Spohn Published: 1996 Total Pages: 390 Get eBook
Union List of Geologic Field Trip Guidebooks of North America Geoscience Information Society. Guidebooks Committee Published: 1986 Total Pages: 244 Get eBook
The Feasibility of Environmental Interpretation Guides for Interstate Highway Travelers David Wallace Cate Published: 1980 Total Pages: 218 Get eBook
Outstanding Scenic Geological Features of Pennsylvania Alan R. Geyer Published: 1979 Total Pages: 538 Get eBook
