View Down River with Boulder, Granite Rapids, Grand Canyon, Arizona, June 19, 1967

Reflections on Edges of River, Mile 122, Grand Canyon, Arizona, June 27, 1967

Seep with Green Areas, Vasey's Paradise, Marble Canyon, Arizona, June 15, 1967

View Across Colorado, Lava Canyon, Grand Canyon, Arizona, June 16, 1967

View Across Colorado River, Lava Canyon, Grand Canyon, Arizona, June 16, 1967

Cottonwood Tree, Lava Canyon, Grand Canyon, Arizona, June 17, 1967

Reflections on Sand and Water at Edge of River, Mile 122, Grand Canyon, Arizona, June 22, 1967

River with Shadow on Canyon Wall, Mile 122, Grand Canyon, Arizona, June 22, 1967

Gerlache Strait to Neumayer Passage from Research Vessel "Hero", Antarctica, February 24, 1976

Hedgehog Cactus with Terpentine Bush, Madrona Ranger Station, Saguaro National Monument, Arizona, April 13, 1953

Psilostrophe cooperi, Old Spanish Trail, Tucson, Arizona, April 15, 1953

Gerlache Strait from Research Vessel "Hero", Antarctica, February 25, 1976

Iceberg and Fog, Amundsen Sea From United States Coast Guard Cutter "Glacier", Antarctica, February 1976

Mud Flat with Ice, Litchfield Island, Palmer Station, Antarctica, February 11, 1976

Mount Erebus, Departure from McMurdo Station on U.S. Coast Guard Cutter "Glacier," January 16, 1976

Spurious Sun, Amundsen Sea, Antarctica, January 24, 1976

Adélie Penguins on Snowbank, Hermit Island, Palmer Station, Antarctica, February 14, 1976

Brabant Island from Research Vessel "Hero", Antarctica, February 23, 1976

Mount Francais, Bismarck Strait from Research Vessel "Hero", Antarctica, February 24, 1976

Mount Erebus, Departure from McMurdo Station on U.S. Coast Guard Cutter "Glacier," January 16, 1976