Illinoian outwash in southeastern Pennsylvania /

Autor Lockwood W. N., Meisler, Harold, 1931-1991
Vydáno 1960

Geology of rocks of Pennsylvanian age in the southern half of the Tremont quadrangle Schuylkill County, Pennsylvania /

Autor Wood, Gordon H., Trexler, J. Peter, Yelenosky, Andy, Soren, Julian
Vydáno 1962

Coal resources of Beaver County, Pennsylvania /

Autor Patterson, Elmer D.
Vydáno 1963

Coal resources of Lawrence County, Pennsylvania /

Autor Van Lieu, J. A., Patterson, Elmer D.
Vydáno 1964

Uranium occurrences in sedimentary rocks of Pennsylvania : contributions to the geology of uranium /

Autor Klemic, Harry, 1920-
Vydáno 1962