The short version The archive turns up 157 records, most of them around Grand Canyon. 11 are confidently dated; the other 146 are educated guesses — about as precise as it sounds. All are free to use.
Aspen and Conifer Forest, Grand Canyon Rim, 1948
1948 · Grand Canyon
Grand Canyon Erosion Study, 1944
1944 · Grand Canyon
Huerta de Cítricos con Palmeras, Años 1940, Colonia Mediterránea o Norteafricana
1940–1949
Niños en traje de vaquero en feria rural, años 1940
1940–1949
Alpine Wildflowers, años 1940
1940–1949
Garganta de pizarra con lecho rocoso estratificado, años 1940
1940–1949
Avión en vuelo, años 1940
1940–1949
Turista en la Puerta de Piedra Inca, Perú, años 1940
1940–1949
Mapa en relieve de las Hawaiian Islands, años 40
1940–1949
Scout en Uniforme de Gala, años 1940
1940–1949
Valle alpino con asentamiento disperso, años 1940
1940–1949
Ordnance Field Study, 1940s
1940–1949
Busto Azul en Sombra Perenne, Años 1940
1940–1949
Tulip Farm Display Garden, Netherlands, circa 1950s
1948–1958
Fiesta de oficina con pastel de cumpleaños, circa 1950
1948–1952
Mujer en la playa, años 1940
1940–1947
Water Skiing, Inland Lake, circa 1950s
1945–1960
Dahlias Behind Chain-Link Fence, 1950s
1945–1960
Funcionarios Forestales en un Bosque de Pinos de Hoja Larga, Florida o Sureste, Años 1940
1940–1950
Garden Party Group, British Cottage, década de 1940
1940–1950
Reunión social de iglesia, años 40
1940–1948
Cascade Range Forest Vista, Pacific Northwest, circa 1950s
1948–1958
Mujer en vestido rayado entre tulipanes, años 1940
1940–1948
Mountain Valley Through Conifer Forest, circa 1950s
1948–1958
Dos chicas con un sedán azul, años 1940
1940–1945
Picnic en la playa con niños, años 1940
1940–1948
Poste de barbería y multitud en parque de diversiones o feria, años 1950
1948–1958
Demostración del servicio de extensión para el cultivo de maíz, ca. 1950s
1948–1955
Niña con atuendo de Pascua, barrio residencial estadounidense, años 1940
1940–1946
Cala rocosa con bote amarrado y visitantes, costa irlandesa o escocesa, circa 1950s
1945–1960
Grand Canyon of the Yellowstone, Yellowstone National Park
1940–1965
Cadena montañosa cubierta de nieve con bosque en primer plano, Pacific Northwest, circa 195
1945–1960
Army Talent Show, circa 1940s
1940–1946
Niagara Falls from the Canadian Shore, 1940s–1950s
1940–1955
Picnic Party at Subtropical Gardens, circa 1950s
1945–1960
Alpine Gorge with Chapel, Central European Mountain Valley, 1950s
1948–1960
Mountain Resort Lodge with Alpine Forest, Circa 1950s
1945–1960
Mountain Road Construction, Alpine Region, circa 1950s
1945–1960
Mountain Valley Viewed from a Tunnel Window, Mid-20th Century
1945–1965
Spanish Colonial Courtyard with Bougainvillea, 1950s
1948–1955
Formal Garden Border, ca. 1940s–1950s
1940–1955
Child with Toy Drum Set, circa 1950s
1948–1958
Lakeside Pavilion Interior, Summer c. 1950s
1945–1960
Manhattan Waterfront from Bridge, Mid-20th Century
1945–1955
Mediterranean Courtyard with Blue Column and Hydrangeas, circa 1950s
1945–1965
Puerta institucional con Live Oaks, American South, mediados del siglo XX
1945–1965
Formal Garden with Massed Plantings, Mid-20th Century
1945–1965
Tourist at Classical Ruin with Evergreen Shade, 1950s
1948–1958
certain
inferred
low confidence