Schereschewsky, Joseph Williams, 1873-, Tuck, Davis Henry, 1886-1953, United States. Public Health Service. Public health bulletin no. 71 · Washington, Govt. print. off. · leaf 208
Fig. 11.—Four-mantle gas arc lamp. 189 … Fig. 12.—Distribution curve o£ reflector D-lo and 50-watt gem lamp. 190
Occupational diseases · Factories · Textile industry · Industries
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