The Voice of Carelton Alumni (1957).

Miscellaneous personal papers []. v.d.

Operations Analysis in World War II --report. (1947)

Correspondence []. v.d.

National Research Fellow --notebook. (1927)

Articles and clippings [, v.p.]. v.d.

Photographs.

International Cooperation in Geographical Research & the Air Force Role in Geophysics --report. (August 1967)

The Aeronomy Story.

Oral history transcript (April 1978).

Speeches.

Awards and citations.

International Geophysical Year (1957-1958) [n.d.].

Subcommittee on Independent Offices--House of Representatives--statement to [n.d.].

Union Geodesique et Geophysique International Association de Meterologie --program with English and French text. (1948)

Office of Aerospace Research--U.S. Air Force (1968).

Early Days in Baltimore--Chapter 1.

Institute of Geophysics and Planetary Sciences, UCLA [n.d.].

Favorite Professor of UCLA Class of 1942--plaque.

National Academy of Sciences of the United States of America--award [1957].

Photographs.

Birthday note from Pol Swings (International Astronomical Union) [n.d.].

Research Fellow Board--National Research Council--certificate of award (1927).