Petroleum workers -- United States -- History. / https://id.loc.gov/authorities/subjects/sh85100469 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh99005024 : Schmidt, John,
Petrology -- Early works to 1800. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/subjects/sh99001366 : Werner, Abraham Gottlob,
Petrology -- Front Range (Colo. and Wyo.) / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/subjects/sh85052066-781 : Gable, Dolores J.,
1969
1
Petrology -- Galapagos Islands. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/names/n82058890-781 : McBirney, Alexander R.
Petrology -- Maine -- Moose River. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/subjects/sh85087178-781 : Boucot, A. J.
Petrology -- Montana. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/names/n80010207-781 : Hess, Harry Hammond,
1960
1
Petrology -- New Jersey. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/names/n80046086-781 : Walker, Kenneth R.
1969
1
Petrology -- New York (State) / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/names/n80126293-781 : Walker, Kenneth R.
1969
1
Petrology -- North America. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/subjects/sh85092455-781 : Geological Society of America.
1968
1
Petrology -- North America -- Congresses. / https://id.loc.gov/authorities/subjects/sh85100472 https://id.loc.gov/authorities/subjects/sh85092455-781 https://id.loc.gov/authorities/subjects/sh99001533 : George H. Hudson Symposium