Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Arctic Tern, Matinicus Rock, Maine, July 31, 1949

Arctic Tern, Matinicus Rock, Maine, July 31, 1949

Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Beech Grove, Road to Clingman's Dome, Great Smoky Mountains National Park, Tennessee, April 26, 1968

Giant Lobelia Seedling, Upper Teleki Valley, Mount Kenya, Africa, February 14,1970

Floating Leaves and Reflections, Aspen, Colorado, October 3, 1951

Strangler Fig Roots, Everglades National Park, Florida, March 7, 1954

A Turkey Track cowboy is hurt when his mount steps in a prairie dog hole and throws him. Turkey Track Ranch, Texas.

[Chief Tall Crane and group of Rosebud Sioux at St. Louis Exposition]

Montana Range Cattle leaving the Badlands After a Severe Blizzard. Yellowstone River in the distance

Inscription and Vines, Temple of Two Kings, Dujiang Dam, Wanxian, Sichuan, China, July 4, 1980

Lama, Guangjuesi [Wudangzhao Monastery], Baotou, Inner Mongolia, China

Lion Statue in Field, Tang Tombs, Shuen Ling, Xi'an, China, June 25, 1980

Stele to Han Wudi, Han Tomb, Xi'an, China, June 25, 1980

View in Rosehill Cemetery, No. 3

Sunset Clouds, Sleeping Rainbow Ranch, Capitol Reef National Park, Utah, August 28, 1963

Storm Over Running Sand River, Jinghong, Yunnan, China, October 23, 1981

Peasant House, Guangwei Production Brigade, near Kunming, Yunnan, 1981