Cai Defu
Cain Byron Lee
Callan Stephen Joseph
Campagnie Generale De Geophysique
Cannell William A. C.
Canny Duane
Cao Chung Van
Capron Dennis F.
Carman, Jr. Wilson H.
Cassand Jean
Charles B. Reynolds & Associates
Chelminski Paul
Chesnutt Dennis P.
China National Petroleum Corporation
Clifton Robert D.
Cole Jack
Cole Jack Howard
Compagnine Generale de Geophysique
Companie General De Geophysique
Computalog U.S.A., Inc.