(1981). Petrology and petrography for U.S. Geological Survey test wells 1,2 and 3 in the madison Limestone in Montana and Wyoming. Denver, Colo. : U.S. Geological Survey.
Chicago-referens (17:e uppl.)Petrology and Petrography for U.S. Geological Survey Test Wells 1,2 and 3 in the Madison Limestone in Montana and Wyoming. Denver, Colo. : U.S. Geological Survey, 1981.
MLA-referens (9:e uppl.)Petrology and Petrography for U.S. Geological Survey Test Wells 1,2 and 3 in the Madison Limestone in Montana and Wyoming. Denver, Colo. : U.S. Geological Survey, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.