Author
United States. National Park Service
Geological Survey (U.S.)
2
Barbour, Barton H., 1951-
1
Casilliano, Michael
1
Clark, Melanie L.
1
Grand Teton National Park (Agency : U.S.)
1
McGrew, Paul O. 1909-1983
1
National Elk Refuge (Agency : U.S.)
1
O'Ney, Susan
1
U.S. Fish and Wildlife Service
1
Wheeler, Jerrod D.
1
Wright, Peter R.
1
Zelt, Ronald B.
1