Schereschewsky, Joseph Williams, 1873-, Tuck, Davis Henry, 1886-1953, United States. Public Health Service. Public health bulletin no. 71 · Washington, Govt. print. off. · leaf 204
Fig, 2.—Type of reflector OB. … Fig. 3.—Type of reflector F-9.
Occupational diseases · Factories · Textile industry · Industries
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