AUTHOR
Kane, Dennis B.
Skinner, Thomas
10
WQED (Television station : Pittsburg, Pa.)
National Geographic Society
6
National Geographic Society, Washington, D.C
4
Birch, Miriam
2
Jampel, Barbara
2
Breeden, Stanley
1
Brock, Norris
1
Buch, Miriam
1
Hughes, Carol
1
Hughes, David
1
Noxon, Nicolas
1
Pomasanoff, Alex
1
Wright, Belinda
1