A black and white photo of two men in suits. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Two men standing next to each other in a room. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain photograph of farming, farmer, agriculture, 20th-century, free to use, no copyright restrictions.
A black and white photo of a man in a suit. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
A black and white photo of a man in a suit, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. Gene Mehr
Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description
Public domain photograph of United States countryside, nature, during 1930s, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.
Picryl description: Public domain image of a quarry, excavation or mining site, free to use, no copyright restrictions.
Skioptikonbild från Institutionen för fotografi vid Kungliga Tekniska Högskolan. Använd av professor Helmer Bäckström som föreläsningsmaterial. Bäckström var Sveriges första professor i fotografi vid Kungliga T Mehr
Picryl description: Public domain image of a quarry, excavation or mining site, free to use, no copyright restrictions.
Northrop P-61A-5 Black Widow (AAF42-5572) Hinweis: Verwendung bei Veröffentlichung in Flight Research at Ames; 57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig 44
Picryl description: Public domain image of a military aircraft, assembly line, industrial facility, 1930s aviation, free to use, no copyright restrictions.
Public domain photograph of life in the United States in the 1930s, free to use, no copyright restrictions image - Picryl description
Fotos von Wissenschaftlern, Sonderveranstaltungen und nuklearen Forschungseinrichtungen, Instrumenten und Projekten im Berkeley Lab
Public domain photograph of 1930s-1940s Virginia, no copyright restrictions image - Picryl description
Picryl description: Public domain image of children in poverty, child labor, Great Depression, 1930s, migrant workers, free to use, no copyright restrictions.
Picryl description: Public domain photograph of an office worker, 1930s, free to use, no copyright restrictions.
Public domain photograph of American farm workers, countryside in the 1930s, free to use, no copyright restrictions image - Picryl description
Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Public domain photographs related to race relations, African Americans, discrimination, segregation, 1930s, free to use, no copyright restrictions image - Picryl description
Public domain photograph of laboratory, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a commercial or residential multi-story building, condominium, 20th century, free to use, no copyright restrictions.
Public domain photograph of living room, apartment, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of children in poverty during the Great Depression, migrant workers, free to use, no copyright restrictions.
Picryl description: Public domain image of trees, forest, park, free to use, no copyright restrictions.
Picryl description: Public domain image of a park, trees, outdoors, free to use, no copyright restrictions.
Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
Public domain photograph - historical image of Nevada, United States, free to use, no copyright restrictions image - Picryl description
Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.
Picryl description: Public domain historical photo of Washington DC during the First World War, free to use, no copyright restrictions image.
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.
Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, no copyright restrictions image - Picryl description
Picryl description: Public domain photograph of the 1930s - 1940s, woman, female portrait, United States, free to use, no copyright restrictions.
Picryl description: Public domain image of an aircraft, assembly line, industrial facility, 1930s aviation, free to use, no copyright restrictions.
Public domain photograph of nurses, hospital, medical care, free to use, no copyright restrictions image - Picryl description