Platt, F. (1881). The geology of Blair County: With illustrations and an atlas. Board of Commissioners for the Second Geological Survey.
Chicago-Zitierstil (17. Ausg.)Platt, Franklin. The Geology of Blair County: With Illustrations and an Atlas. Harrisburg: Board of Commissioners for the Second Geological Survey, 1881.
MLA-Zitierstil (9. Ausg.)Platt, Franklin. The Geology of Blair County: With Illustrations and an Atlas. Board of Commissioners for the Second Geological Survey, 1881.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.