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Karling, J. S. (1924). A Preliminary Account of the Influence of Light and Temperature on Growth and Reproduction in Chara fragilis. Bulletin of the Torrey Botanical Club, 51(12), 469.
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Adams, J. (1925). Some Further Experiments On The Relation Of Light To Growth. American Journal of Botany, 12(7), 398–412.
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Rayleigh, L. (1928). Some Recent Work on the Light of the Night Sky1. Nature, 122(3070), 315–317.
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Rayleigh, L. (1929). A Photoelectric Method of Measuring the Light of the Night Sky with Studies of the Course of Variation through the Night. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 124(794), 395–408.
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Cottam, C. (1929). A shower of grebes. The Condor, 31(1), 80–81.
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