AUTHOR
Skinner, Thomas
Kane, Dennis B.
11
WQED (Television station : Pittsburg, Pa.)
11
National Geographic Society
7
National Geographic Society, Washington, D.C
5
Jampel, Barbara
4
Birch, Miriam
2
Breeden, Stanley
1
Brock, Norris
1
Buch, Miriam
1
Hughes, Carol
1
Hughes, David
1
Kane, Dennis
1
Noxon, Nicolas
1
Pomasanoff, Alex
1
WQED (Television station : Pittsburgh, Pa.)
1
Wright, Belinda
1