Keefer, William R. 1924-
The Geologic Story of Yellowstone National Park / By William R. Keefer ; Illustrated by John R. Stacy. -- Washington : United States Government Printing Office, [1972?] - 92 p. il. -- (Geological Survey Bulletin ; 1347).
Fecha real de registro 15-05-1972
Geologia - Parque nacional de Yellowstone
551.7(7 Yellowstone)
The Geologic Story of Yellowstone National Park / By William R. Keefer ; Illustrated by John R. Stacy. -- Washington : United States Government Printing Office, [1972?] - 92 p. il. -- (Geological Survey Bulletin ; 1347).
Fecha real de registro 15-05-1972
Geologia - Parque nacional de Yellowstone
551.7(7 Yellowstone)