Yellow Leaves and Asters, Sangre de Cristo Mountains, Santa Fe Basin, New Mexico, September 20, 1950

Yellow Leaves and Asters, Sangre de Cristo Mountains, Santa Fe Basin, New Mexico, September 20, 1950

Peeling Birch Bark, Great Spruce Head Island, Maine, June 24, 1969

Peeling Birch Bark, Great Spruce Head Island, Maine, June 24, 1969

Trees and Pond, near Sherborn, Massachusetts, April 1957

Columns in Hypostyle, Temple of Amun, Karnak, Luxor, Egypt, January 25, 1973

Red River Gorge, Kentucky

Hard Inclusions in Sandstone, Gray's Arch Trail, Red River Gorge, Kentucky, April 18, 1968

Sunset Clouds, Chiricahua Mountains, Arizona, June 1959

Evening Reflections on Sea, Schollaert Channel, Antarctica, February 26, 1976

Lichen on Brown Rock, Sugar Loaf, Barred Islands, Maine, June 23, 1969

Lichen on Brown Rock, Sugar Loaf, Barred Islands, Maine, June 23, 1969

White Aspens and Hillside, Route 14, Routt County, Colorado, May 28, 1975

Bunchberries and Crowberry, Great Spruce Head Island, Maine, August 2, 1954

Paper Flower Wreaths, Church of Xocchel, Yucatan, Mexico, 1955-1956

Paper Flower Wreaths, Church of Xocchel, Yucatan, Mexico, 1955-1956

School Class, China, 1981

Qiungzhu Monastery, Kunming, Yunnan, 1981

Village near Xi'an, Shaanxi, 1981

Commune Day Care House Near Canton, 1981