Filtering by: Creator mcmanus, george, 1884-1954 Remove constraint Creator: mcmanus, george, 1884-1954 File Format image/tiff Remove constraint File Format: image/tiff Place (Topic) hoover dam (ariz. and nev.) Remove constraint Place (Topic): hoover dam (ariz. and nev.) Time Period (Topic) 1930s (1930-1939) Remove constraint Time Period (Topic): 1930s (1930-1939)