Author
National Geographic Society
9
Mills, Andrea
3
National Geographic
3
BBC Earth
2
Bonnett, Alastair
2
British Broadcasting Corporation
2
Casey, Susan
2
Columbia University Press
2
Cunha, Stephen F.
2
Fuller, Gary
2
George Philip & Son
2
Hansen, Grace
2
Illinois State Geological Survey
2
Jahren, Hope
2
Jenkins, Steve
2
Tucci, Paul A.
2
Wiggers, Ray
2
Willman, H. B.
2
Woodward, John
2
Alvarez, Walter
1
Amstutz, Lisa J.
1
Baby Professor
1
Balkan, Gabrielle
1
Ball, Nate
1
Barton, Bethany
1
Baugh, L. Sue
1
Big Kids Productions
1
Black, Sonia W.
1
Boehm, Richard G.
1
Breining, Greg
1
Brooks, Andrew
1
Brown, Aly
1
Brown, Don
1
Brown, Kenneth A.
1
Canavan, Thomas
1
Chapple, Janet
1
Chin, Jason
1
Chronic, Halka
1
Chrzastowski, Michael J.
1
Colson, Rob
1
Corliss, William R.
1
Cousteau, Ashlan
1
Cramp, Jess
1
Crown Publisher/Cambridge University Press
1
DK Publishing, Inc
1
Danzer, Gerald A.
1
Davis, Kenneth C.
1
Dean, Jessica
1
Dennie, Devin
1
Department of Natural Resources
1
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