Author
Geological Survey (U.S.),
2
Beikman, Helen M.
1
Beikman, Helen M.,
1
Domning, Daryl P.
1
Geological Survey (U.S.)
1
McKenna, Malcolm C.
1
Rau, Weldon W.,
1
Ray, Clayton Edward
1
Smithsonian Institution. Press
1
Snavely, P. D. 1919-2003
1
Snavely, P. D. 1919-2003,
1
Wagner, Holly C. 1918-2005,
1
Wolfe, Jack A., 1936-
1