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Some photometrical measurements [microform] (1904)
Smith, W. G. (William George), 1872-1943 · [Toronto : University Library] · leaf 5
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W. G. SMITH, B.A ASSISTANT IN THE PSYCHOLOGICAL LABORATORY, UNIVERSITY OF TORONTOPhotometry · Colors · Photométrie · Couleurs
Internet Archive · Canadiana.org · Public domain (published before 1931). Free to use for anything.
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