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1
Guidebook, 24th Annual Field Conference of Pennsylvania Geologists /
[Harrisburg] : Pennsylvania Geological Survey, 1959

Conference Proceeding Book
2
Guidebook, 24th Annual Field Conference of Pennsylvania Geologists May 15, 16, 17, 1959, Titusville, Pa. : Drake Well Centennial.
[Harrisburg] : Pennsylvania Geological Survey, 1959

Government Document Conference Proceeding Book
3
Guidebook, 24th Annual Field Conference of Pennsylvania Geologists /
[Harrisburg] : Pennsylvania Geological Survey, 1959

Conference Proceeding Book
4
Tomorrow's oasis today : proceedings of the Conference on Presque Isle and the Erie Bayfront, Erie, Pennsylvania, September 26-27, 1985 /
Erie, Pa. : Erie County Dept. of Planning, Erie County Court House, 1985

Conference Proceeding Book
5
Guidebook, 24th. Annual Field Conference of Pennsylvania Geologists, May 15, 16, 17, 1959, Titusville, Pa. : Drake Well Centennial.
[Harrisburg] : Pennsylvania Geological Survey, 1959

Conference Proceeding Book
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