4 Pages in Charles Darwin's Library associated with "people/references - Darwin, Charles Robert The variation of animals and plants under domestication London 1868"

Die Bastardbefruchtung im Pflanzenreich
By: Wichura, Max.
Publication info: Breslau, E. Margenstern, 1865
Pages: Page 43 Page 43 End Note 2
über die Berechtigung der Darwin'schen Theorie
By: Weismann, August,
Publication info: Leipzig, W. Engelmann, 1868
Pages: Page 29