This is the cover page from a missive published by the Industrial Workers of the World in 1919. Established in 1905, the IWW was, and is, among the more radical unions. Although this international labor union has no official political affiliation, its language and mission have a socialist, anarchistic bent: "It is the historic mission of the working class to do away with capitalism. The army of production must be organized, not only for everyday struggle with capitalists, but also to carry on production when capitalism shall have been overthrown. By organizing industrially we are forming the structure of the new society within the shell of the old (from the Preamble of the IWW Constitution)."
Image from the American Memory project at the Library of Congress. See the rest of the document here.
"With drops of blood. The history of the Industrial workers of the world has been written..." Wm. Haywood. Secretary. Chicago, 1919. Library of Congress, Printed Ephemera Collection; Portfolio 18, Folder 55.