Whittaker Business. Los Angeles, California: Whittaker Corporation, First Quarter 1976

Whittaker Business. Los Angeles, California: Whittaker Corporation, First Quarter 1976, Volume: Gilbert D1194. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/528039 Accessed December 27, 2025.