Filtering by: Resource Type image Remove constraint Resource Type: image Subject united states antarctic service expedition (1939-1941) Remove constraint Subject: united states antarctic service expedition (1939-1941) Time Period (Topic) 1930s (1930-1939) Remove constraint Time Period (Topic): 1930s (1930-1939) Time Period (Topic) 1940s (1940-1949) Remove constraint Time Period (Topic): 1940s (1940-1949)