Clearfield County

Clearfield County

Julie Rae Rickard.

History of Northwestern Pennsylvania: comprising the counties of Erie, Crawford, Mercer, Venango, Warren, Forest, Clarion, McKean, Elk, Jefferson, Cameron and Clearfield

by Joseph Riesenman, Jr

Geology and mineral resources of the Philipsburg 7 1/2-minute quadrangle, Pennsylvania

by Gary B. Glass.

Caldwell's Illustrated, historical, combination atlas of Clearfield County, Pennsylvania.

From actual surveys by & under the directions of J. H. Newton

Bedrock geologic map, coal-resource maps, and digital datasets of the Brandy Camp quadrangle, Elk, Jefferson, and Clearfield counties, Pennsylvania

by Clifford H. Dodge

A method for determining post-depositional alteration in underclays and associated lithologies

by Michael G. Jaron.

Some genealogies and family records

compiled by Albert Y. Straw.

Revised lithostratigraphic nomenclature of the Pottsville and Allegheny groups (Pennsylvanian): Clearfield County, Pennsylvania

[by] William E. Edmunds.

Curwensville quadrangle: geology and mineral resources

by George H. Ashley ; Geology by G.H. Ashley and Frederick G. Clapp

Bedrock geologic map, coal-resource maps, and digital datasets of the Kersey quadrangle, Elk and Clearfield counties, Pennsylvania

by Clifford H. Dodge