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. JSTOR4330767. S2CID83708471.
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. JSTOR4330767. S2CID83708471.
Price, Kitty (26 September 2021). "The Hierarchy of Angels". Portsmouth Cathedral. Retrieved 8 December 2023.
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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. JSTOR4330767. S2CID83708471.