Filtering by: Resource Type moving image Remove constraint Resource Type: moving image Subject antarctica--aerial exploration Remove constraint Subject: antarctica--aerial exploration Subject airplanes Remove constraint Subject: airplanes Subject hearst, william randolph, 1908 Remove constraint Subject: hearst, william randolph, 1908 Subject equipment and supplies Remove constraint Subject: equipment and supplies Time Period (Topic) 1920s (1920-1929) Remove constraint Time Period (Topic): 1920s (1920-1929)