Sun Letter. Corpus Christi, Texas: Coastal Bend Solar Energy Society, January 1980

Sun Letter. Corpus Christi, Texas: Coastal Bend Solar Energy Society, January 1980, Volume: Gilbert C501. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527647 Accessed December 27, 2025.