AUTHOR
Kane, Dennis B.
Skinner, Thomas
11
WQED (Television station : Pittsburg, Pa.)
10
National Geographic Society
8
National Geographic Society, Washington, D.C
5
Jampel, Barbara
3
Birch, Miriam
2
Noxon, Nicolas
2
Ballard, Robert D.
1
Breeden, Stanley
1
Brock, Norris
1
Buch, Miriam
1
Hughes, Carol
1
Hughes, David
1
Huley, Graham
1
Pomasanoff, Alex
1
Saxon, David
1
WQED (Television station : Pittsburgh, Pa.)
1
Wiser, Christine
1
Wolfer Production
1
Wright, Belinda
1
Young, Rober M.
1