Geology of the Red Valley sandstone in Forest and Venango Counties, Pennsylvania / by Dana R. Kelley

Chicago citation style
Kelley, Dana R. Geology of the Red Valley sandstone in Forest and Venango Counties, Pennsylvania / by Dana R. Kelley. Retrieved from the Digital Public Library of America, https://archive.org/details/geologyofredvall00kell. (Accessed September 21, 2018.)
APA citation style
Kelley, Dana R, Geology of the Red Valley sandstone in Forest and Venango Counties, Pennsylvania / by Dana R. Kelley. Retrieved from the Digital Public Library of America, https://archive.org/details/geologyofredvall00kell
MLA citation style
Kelley, Dana R. Retrieved from the Digital Public Library of America <https://archive.org/details/geologyofredvall00kell>.
Note: These citations are programmatically generated and may be incomplete.