HOPPOCK, ROBERT.
Job satisfaction. Photo studies by Lewis W. Hine. Aerial photography by Virgil Kauffman.
HOPPOCK, ROBERT. Job satisfaction. Photo studies by Lewis W. Hine. Aerial photography by Virgil Kauffman. © 10Oct35; A86734. Robert Hoppock (A); 7Dec62; R306151.
Robert Hoppock|A