Books by Theunissen, Bert 1 books by this author Found Matches | Filtered / Theunissen, Breeding without Mendelism. Theory and practice of diary cattle breeding..., 2008. Theunissen, Bert: Breeding without Mendelism. Theory and practice of diary cattle breeding in the Netherlands 1900–1950. In: Journal of the History of Biology 41 (2008). S. 637–676.