Schereschewsky, Joseph Williams, 1873-, Tuck, Davis Henry, 1886-1953, United States. Public Health Service. Public health bulletin no. 71 · Washington, Govt. print. off. · leaf 136
FiQ. 7.—Characteristic illumination gradient, cutting table, in proximity to and perpendicular to windows. 123 … Fig. 8.—Characteristic illiuninatiou gradient, cutting table parallel to window.
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