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Author (up) Title Year Publication Volume Pages
Cottam, C. A shower of grebes 1929 The Condor 31 80-81
Rayleigh, L. A Photoelectric Method of Measuring the Light of the Night Sky with Studies of the Course of Variation through the Night 1929 Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 124 395-408
Strutt, R.J. A photoelectric method of measuring the light of the night sky with studies of the course of variation through the night 1929 Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character 124 395-408