The problem of dust phthisis in the granite-stone industry
By: by Frederick L. Hoffman ... May, 1922.
Series: Bulletin of the United States Bureau of labor statistics ;; no.  293.; Industrial accidents and hygiene series.
Publisher: Govt. print. off.
Published: 1922
Place of publication: Washington
Language: eng
Number of pages: 178
Subjects: Dust.; Granite industry and trade -- Health aspects.; Tuberculosis.
Notes: "List of references": p. 163-167.
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.