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II, No. 1, pp. 53f. Goldschmidt, R. A Case of Facultative Parthenogenesis. Biol. Bulletin, 1917. Vol. XXXII, No. 1, p. 38. Goldschmidt, R. Intersexuality and the Endocrine Aspect of Sex. Endocrinology, Vol. I, p. 434. 1917. Fine summary of the work done on moths, birds and various forms by many biologists. Riddle, Dr Oscar.
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