Ice on the World, National Geographic, 1987
Hidden Life of the Timber Rattler, National Geographic, 1987
National Geographic, 1980.
National Geographic, 1977
Photograph by Harold E. Edgerton, National Geographic, 1987.
Photograph by Harold E. Edgerton, National Geographic, 1987.
In Long-Forbidden Tibet, National Geographic, 1980
National Geographic, 1977.
National Geographic, 1977
Kids and the world’s second largest meteorite, National geographic, 1986.
Brazil’s Txukahameis : Good-bye to the Stone Age, National Geographic, 1975
1975
National geographic, 1972
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