Papers concerning UFOs, 1952-1976


Date: 1952-1976 | Size: 12 Linear feet, Ca. 12,000 items


This collection includes correspondence, articles, newsclippings, photographs, and recordings, concerning Menzel's documentation of UFOs as natural phenomena explainable in scientific terms. One can find material on the National Investigation Committee on Aerial Phenomena, Project Blue Book, the Velikovsky controversy, and a card file of meteor activity, 1946-1961.

Background note

Donald Howard Menzel was an astrophysicist.

Digital objects note

This collection contains digital materials that are available in the APS Digital Library. Links to these materials are provided with context in the inventory of this finding aid. A general listing of digital objects may also be found here.

Collection Information


Presented by Donald Howard Menzel and family, 1963-1982; accessioned, 10/--/1971. See in-house shelf list for additional accession numbers and dates.

Related material

Donald Howard Menzel's Autobiography is also located in the American Philosophical Society Library (Mss.B.M522).

Indexing Terms

Corporate Name(s)

  • National Investigations Committee on Aerial Phenomena.
  • Project Blue Book (U.S.)


  • Card files.
  • Clippings.
  • Photoprints.
  • Recordings.

Personal Name(s)

  • Botley, Cicely Mary
  • Boyd, Lyle Gifford, 1907-1982
  • Condon, Edward Uhler, 1902-1974
  • Hynek, J. Allen (Joseph Allen), 1910-1986
  • Keyhoe, Donald E. (Donald Edward)
  • Klass, Philip J.
  • Maney, Charles Albert
  • Markowitz, William
  • Menzel, Donald Howard, 1901-1976
  • Quintanella, Hector
  • Sagan, Carl, 1934-1996
  • Schreibsten, Norman
  • Velikovsky, Immanuel, 1895-1979
  • Wellman, Wade


  • Astronomy.
  • Meteors.
  • Unidentified flying objects.

Detailed Inventory

 Roscoe H. Hillenkoetter - Correspondence, 1961-1965