(1968). Mineral resources of the Appalachian region: A compilation of information on the mineral resources, mineral industry, and geology of the Appalachian region. US Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Mineral Resources of the Appalachian Region: A Compilation of Information on the Mineral Resources, Mineral Industry, and Geology of the Appalachian Region. Washington: US Gov. Print. Off, 1968.
MLA-Zitierstil (9. Ausg.)Mineral Resources of the Appalachian Region: A Compilation of Information on the Mineral Resources, Mineral Industry, and Geology of the Appalachian Region. US Gov. Print. Off, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.