Louis Figuier
Edgar Winston Spencer
Philip J. Currie
Douglas H. Erwin
Stephen Jay Gould
Bernhard Kummel
Sergio F. Vizcaíno
Jon M. Poort
George R. McGhee
Norman Dennis Newell
Alan B. Shaw
Alcide Dessalines d’Orbigny
Amadeus W. Grabau
Harold L. Levin
International Geological Congress (20th 1956 Mexico City, Mexico)
Norman F. Hughes
B. E. Walker
John William Dawson
L. L. Khalfin
Unknown Author