Thompson, F. (1955). The I. W. W., its first fifty years, 1905-1955: The history of an effort to organize the working class. Chicago: Industrial Workers of the World.

Thompson, Fred. The I. W. W., Its First Fifty Years, 1905-1955: The History of an Effort to Organize the Working Class. Chicago: Industrial Workers of the World, 1955.

Thompson, Fred. The I. W. W., Its First Fifty Years, 1905-1955: The History of an Effort to Organize the Working Class. Chicago: Industrial Workers of the World, 1955.