Supervision : the magazine of industrial relations and operating management /
N C Christensen
- [Burlington, Iowa, etc.], [National Research Bureau, etc.]
- volumes illustrations 30 cm
- Monthly
- v. 1- Feb. 1939-
"The magazine of industrial relations and operating management."
Vol. 50 repeated in numbering of issues for 1988-1989.
Volumes for 1939- official journal of the National Association of Foremen.