1. Bridges, C. B. (1922). “The origin of variation in sexual and sex-limited characters.”Amer. Naturalist, lvi, 51–63.
2. — (1925). “Sex in relation to chromosomes and genes.”Ibid. lix, 127–37.
3. Garner, W. W. andAllard, H. A. (1923). “Further studies in photoperiodism, the response of the plant to relative length of day and night.”Journ. Agric. Research, xxiii, 871–920.
4. Garner, W. W., Bacon, C. W. andAllard, H. A. (1924). “Photoperiodism in relation to hydrogen-ion concentration of the cell sap and the carbohydrate content of the plant.”Ibid. xxvii, 119–56.
5. Goldschmidt, R. (1920a). Mechanismus und Physiologie der Geschlechisbestimmung. Berlin.