Appel, 1980, pp. 291—319. Appel, T. A. (1980). "Henri De Blainville and the Animal Series: A Nineteenth-Century Chain of Being". Journal of the History of Biology. 13 (2): 291–319. doi:10.1007/bf00125745. S2CID83708471.
Appel, 1980, pp. 291—319. Appel, T. A. (1980). "Henri De Blainville and the Animal Series: A Nineteenth-Century Chain of Being". Journal of the History of Biology. 13 (2): 291–319. doi:10.1007/bf00125745. S2CID83708471.