by Gene S. Stuart ; photographed by Richard Alexander Cooke III ; paintings by H. Tom Hall ; prepared by the Special Publications Division, National Geographic Society, Washington, D.CNational Geographic Societyc1988
by Gene S. Stuart ; photographs by Mark Godfrey ; paintings by Louis S. Glanzman ; prepared by the Special Publications Division, National Geographic Society, Washington, D.CNational Geographic Societyc1981
by George E. Stuart and Gene S. Stuart ; photographs by David Alan Harvey and Otis Imboden ; prepared by the Special Publications Division, National Geographic SocietyNational Geographic Societyc1977