Vorlage:Obruchev, 1968
Aus WORLDFISH WIKI
- Obruchev, D.V. 1968. Ob evolyutsii Heterostraci [On the evolution of Heterostraci]. Pp. 21–23 in Obruchev, D.V. (ed.): Essays on phylogeny and taxonomy of fossil fishes and agnathans. Nauka, Moscow.