Filtering by: File Format video/mp4 Remove constraint File Format: video/mp4 File Format image/jpeg Remove constraint File Format: image/jpeg Resource Type moving image Remove constraint Resource Type: moving image Sub collection sim series 5: films/sound recordings Remove constraint Sub collection sim: series 5: films/sound recordings Subject wilkins, george h. (george hubert), sir, 1888-1958 Remove constraint Subject: wilkins, george h. (george hubert), sir, 1888-1958 Time Period (Topic) 1930s (1930-1939) Remove constraint Time Period (Topic): 1930s (1930-1939) Time Period (Topic) 1920s (1920-1929) Remove constraint Time Period (Topic): 1920s (1920-1929)