The problem of dust phthisis in the granite-stone industry - Hoffman, Frederick L. (Frederick Ludwig), 1865-1946. (Washington, Govt. print. off., 1922)
At head of title: U.S. Department of labor, James J. Davis, secretary. Bureau of labor statistics, Ethelbert Stewart, commissioner.
Issued also as House doc. 275, 67th Cong., 2d sess.
Previous investigations into the dust hazard of certain trades issued as Bulletins nos. 79, 82, and 231 of the U.S. Bureau of labor statistics.
"List of references": p. 163-167.
Keywords: Dust; Granite industry and trade -- Health aspects; Tuberculosis