Jack Hardy (born Dale Zysman; November 18, 1901 – July 2, 1993?), was a 20th-Century Communist author labor leader as "Jack Hardy", and a teacher and board member of the New York City Teachers Union under his birth name "Dale Zysman". Investigation by the New York Board of Education (now the New York City Department of Education) led to public awareness that the two names belonged to one person and subsequent expulsion from the school system in 1941. (From Wikipedia)
More about Jack Hardy: Associated author:Books by Jack Hardy:
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Hardy, Jack, 1901-: Labor and Textiles: A Study of Cotton and Wool Manufacturing (New York: International Publishers, c1931), also by Robert W. Dunn (multiple formats at archive.org)
Additional books by Jack Hardy in the extended shelves:
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Hardy, Jack, 1901-: The economic organization of the Soviet Union (Vanguard Press, 1927), also by Scott Nearing (page images at HathiTrust)
Find more by Jack Hardy at your library, or elsewhere.