ABSTRACT

Brehm 1877. Buffon & Daubenton 1764. Chenu & Desmarest 1858. E. Desmarest 1819. Dubois 1852. Duncan 1892. Frädrich & Frädrich 1973. Gervais 1855. Giebel 1855. Grzimek 1969: 33–72 (with chapters by E. Thenius, E.M. Lang, B. Grzimek and H.G. Klös). Guggisberg 1966a. Hillenius 1971. van der Hoeven 1855. Jardine 1836. Kaup 1833. Llopis 1974a, b, c. Oken 1838. Simon 1966–1971. Stonehouse 1981. Vogt 1884. Walker 1964.