Bulletin of the Bureau Standards, Vol. 14; Relative Sensibility of the Average Eye to Light of Different Colors and Some Practical Applications to Radiation Problems; pp. 167-236: Coblentz, W. W., Emerson, W. B.:
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The Ascidians Collected by the United States Fisheries Bureau Steamer Albatross on the Coast of California During the Summer of 1904, Vol. 4 (Classic Reprint): Ritter, William Emerson: 9781332299164: Amazon.com: Books
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