61 books • 1 series
Summary of the Reports of the State Geologist
Second Geological Survey of Pennsylvania
Report of the Board of Commissioners of the Second Geological Survey of Pennsylvania: For 1876 (Classic Reprint)
Annual Report of the Geological Survey of Pennsylvania for 1886 - Scholar's Choice Edition
A General Index of the Final Summary Report of the Geology of Pennsylvania - Scholar's Choice Edition
PT. II., Cont'd. Book VIII. Eighth Palaeozoic District, or Anthracite Coal-Basins, and Encircling Belts of the Older Carboniferous Rocks. Book IX. Ninth Palaeozoic District, or Bituminous Coal-Fields and Their Associated Older
The geology of Lehigh and Northampton Counties
Geological Survey of Pennsylvania; Final Report Ordered by Legislature, 1891. a Summary Description of the Geology of Pennsylvania Volume 1
Annual Report of the Geological Survey of Pennsylvania for 1885-1887 Volume 2
Geological Survey of Pennsylvania; Final Report Ordered by Legislature, 1891. a Summary Description of the Geology of Pennsylvania Volume 3, PT. 2
Report of Progress Volume 1874-1875
Report of Progress Volume 7
Report of Progress Volume 6
Annual Report on the Geological Survey of the State of Pennsylvania Volume 2
Annual Report of the Geological Survey of Pennsylvania Volume 1
Annual Report on the Geological Survey of Pennsylvania Volume 1-6
Report of Progress Volume . 4, . 3
Report of Progress Volume 4, V. 1
Geological Survey of Pennsylvania; Upper Silurian and Devonian Formations, by J.P. Lesley
Report of Progress Volume 1-2
Report of Progress Volume 8-12
Report of Progress in Volume 1-2
Report of Progress Volume 2
The Geology of Pennsylvania Volume 2, PT. 1; A Government Survey