Filtering by: Resource Type moving image Remove constraint Resource Type: moving image Subject explorers Remove constraint Subject: explorers Subject airplanes Remove constraint Subject: airplanes Subject antarctica--aerial exploration Remove constraint Subject: antarctica--aerial exploration 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)