Geologic atlas of U.S.
Subtitle: Brownsville-Connellsville folio, Pennsylvania.
Contributors: Campbell, Marius R. 1858-1940.
Series: Geologic Atlas of U.S. Folio No. 94
Publisher: [s.n.]
Published: 1903
Place of publication: Washington, D.C
Format: Microform
Subjects: Geological mapping -- Pennsylvania.