U.S. House of Representatives: Symposium on unidentified flying objects. Hearings before the Committee on Science and Astronautics. July 29, 1968

Hearings on July 29, 1968 with statements by J. Allen Hynek, James E. McDonald, Carl Sagan, Robert L. Hall, James A. Harder, Robert M.L. Baker, Donald H. Menzel, R. Leo Sprinkle, Garry C. Henderson, Stanton T. Friedman, Roger N. Shepard and Frank B. Salisbury.

1968, U.S. Government Printing Office, Washington

Softcover, stapled, 247 pages, illustrated