1. Bridges, C. B., 1915, A linkage variation inDrosophila. Journ. exp. Zool.19.
2. -, 1927, The relation of the age of the female to crossing-over in the third chromosom ofDrosophila melanogaster. Journ. Gen. Phys.8.
3. -, 1929, Variation in crossing-over in relation to age of female inDrosophila melanogaster. Publ. 399 Carnegie Inst. of Wash.
4. - andMorgan, T. H., 1923, The third chromosome group of mutant characters ofDrosophila melanogaster. Publ. 327 Carnegie Inst. of Wash.
5. Geppert-Koller, 1938, Erbmathematik, Theorie der Vererbung in Bevölkerung und Sippe. Quelle u. Meyer, Leipzig.