Glacial border deposits of late Wisconsinan age in northeastern Pennsylvania /

by Crowl, G. H.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey : May be purchased from State Book Store, 1980

Geology and mineral resources of the Ramey and Houtzdale quadrangl es, Clearfield and Centre counties, Pennsylvania /

Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977