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  Author (up) Title Year Publication Volume Pages Links
Downey, J.W. Determination of minimum light sense and retinal dark adaptation with presentation of a new type of photometer 1919 American Journal of Ophthalmology 2 13-20 details   url
Patrick, G.T.W. The Psychology of Daylight Saving 1919 The Scientific Monthly 9 385-396 details   url
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