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amplifiers

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Amplifiers, Bolling Field - Glass negative photogrpah. Public domain.

Amplifiers, Bolling Field - Glass negative photogrpah. Public domain.

Public domain photograph of Washington DC, 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

United Nations exhibit put on by OWI in Rockefeller Plaza, New York, N.Y. Central motif was this frame containing copy of Atlantic charter, with amplifiers at each end broadcasting speeches by Roosevelt, Churchill and Chiang Kai-Shek every half hour, and surrounded by statues of the four freedoms

United Nations exhibit put on by OWI in Rockefeller Plaza, New York, N...

Picryl description: Public domain photo of Chinese sculpture, free to use, no copyright restrictions image.

Amplifiers Arlington, 11/4/21 - Glass negative photogrpah. Public domain.

Amplifiers Arlington, 11/4/21 - Glass negative photogrpah. Public doma...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Amplifiers, Bolling Field - Glass negative photogrpah. Public domain.

Amplifiers, Bolling Field - Glass negative photogrpah. Public domain.

Public domain photograph of Washington DC, 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

United Nations exhibit put on by OWI in Rockefeller Plaza, New York, N.Y. Central motif was this frame containing copy of Atlantic charter, with amplifiers at each end broadcasting speeches by Roosevelt, Churchill and Chiang Kai-Shek every half hour, and surrounded by statues of the four freedoms

United Nations exhibit put on by OWI in Rockefeller Plaza, New York, N...

Picryl description: Public domain photo of Chinese sculpture, free to use, no copyright restrictions image.