Postprint version. Published in Labor History, Volume 20, Issue 4, Fall October 1, 1979, pages 510-523.
Copyright © 1979 Taylor & Francis. This is an electronic version of an article published in Labor History.
NOTE: At the time of publication, the author George B. Cotkin was not yet affiliated with Cal Poly.
The definitive version is available at http://dx.doi.org/10.1080/00236567908584550.