Smithsonian Institution. Office of the Secretary & Berry, E. W. (1930). Past climate of north polar region. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary and Edward Wilber Berry. Past Climate of North Polar Region. Washington, D.C.: [publisher not identified], 1930.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary and Edward Wilber Berry. Past Climate of North Polar Region. [publisher not identified], 1930.
Warning: These citations may not always be 100% accurate.