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trade unions
Constantine, K. C. The Man Who Liked Slow Tomatoes. Mario Balzic series, 5/17. Boston: David R. Godine, 1982.
Hoerr, John. Monongahela Dusk. Pittsburgh: Autumn House Press, 2009.
Trautman, William Ernst, and Peter Hagboldt. Hammers of Hell. Chicago: The New World Publishing Company, 1921.
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McCoy, Horace. Scalpel. New York: Appleton-Century-Crofts, 1952.
Mays, Lucinda LaBella. The Candle and the Mirror. New York: Atheneum, 1982.
Glassgold, Peter. The Angel Max. New York: Harcourt Brace & Company, 1998.