Alton Biggs/ Dinah Zike/ Peter Rillero
(1)
Alton Biggs/ Lucy Daniel/ Edward Paul Ortleb/ Peter Rillero/ Dinah Zike/ Sandra K. Enger (CON)
(1)
McGraw Hill Companies (COR)/ National Geographic Society (U. S.)/ Alton Biggs/ Lucy Daniel/ Ralph M. Feather Jr. Ph.D.
(1)
National Geographic Society (U. S.)/ Alton Biggs/ Lucy Daniel/ Ralph M. Feather Ph.D./ Susan Leach Snyder
(1)