TY  - BOOK
AU  - Hoffman,Frederick L.
TI  - The problem of dust phthisis in the granite-stone industry,
T2  - Bulletin of the United States Bureau of labor statistics
AV  - HD8051 .A62 no. 293
PY  - 1922///
CY  - Washington
PB  - Govt. print. off.
KW  - Dust
KW  - Granite industry and trade
KW  - Health aspects
KW  - Tuberculosis
N1  - 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
ER  -