Industrial worker.
Industrial Workers of the World.
Seattle, Wash. : Industrial Workers of the World,
1916-
Place of publication varies: Seattle, Wash., 1916-1931 ; Chicago, Ill., Dec. 8, 1931-  .
Supplement: Lumberjack bulletin, Mar. 9-May  1918.
Official organ of the western branches of the I.W.W.
United States Washington King Seattle.
United States Illinois Cook Chicago.