The Plant: Devoted To Power-Engineering-Maintenance. St. Joseph, Michigan: The Plant Publishing Co., April 1950

The Plant: Devoted To Power-Engineering-Maintenance. St. Joseph, Michigan: The Plant Publishing Co., April 1950, Volume: Gilbert D797. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527062 Accessed December 28, 2025.