Verlag: Glasgow, Jackson, Son & Co. 1937 1937, 1937
Anbieter: Rönnells Antikvariat AB, Stockholm, Schweden
Signiert
XX, 92 pp. + portrait frontispiece + 11 illustration on 6 plates with explanatory textleaf to each. Publisher's cloth, dust-jacket. Loosely inserted is a 2 pp. letter signed Donald Gray (the son?) where he discusses wheter it was right to publish this work: "We were in grave doubt as to wheter it should be published. I gather that he betrays considerable misunderstanding of Mendel's work". He was afraid that the reviewers may be nasty.