Bibliographia Genetica, Deel II (1925): The Genetics of Drosophila; The Genetics of the Sheep [Roberts & Crew], Genetisch-Physiologische Analyse der Heterostylie [G. von Ubisch]; Genetic Monograph on Pisum [Wellensiek]
's-Gravenhage: Martinus Nijhoff, 1925. First Printing. Hardcover. Large 8vo, publisher's cloth gilt, very good. Contains: The Genetics of Drosophila; The Genetics of the Sheep [Roberts & Crew], Genetisch-Physiologische Analyse der Heterostylie [G. von Ubisch]; Genetic Monograph on Pisum [Wellensiek]. 476 pp.