1. Albertus Magnus. 1478. De animalibus. Rome (German: Ruff W, Thierbuch Alberti Magni. Frankurt A.M. 1545).
2. 2000. How humans evolved. New York: WW Norton.
3. THE LAY OF THE “ROOSTER”*
4. 1854. The Animal Kingdom, arranged after its organization; forming a natural history of animals and an introduction to comparative anatomy. Translation. London: WS Orr and Co., Amen Corner, Paternoster Row.
5. 1868. The variations of animals and plants under domestication. Vol. 2. Facsimile edition with new forword by Baltimore: Johns Hopkins University Press.