Synonymy and actual affinities of the putative Middle Eocene "New World vulture" Eocathartes LAMBRECHT, 1935 and "hornbill" Geiseloceros LAMBRECHT,1935 (Aves, Ameghinornithidae)
G. Mayr, Synonymy and actual affinities of the putative Middle Eocene "New World vulture" Eocathartes LAMBRECHT, 1935 and "hornbill" Geiseloceros LAMBRECHT,1935 (Aves, Ameghinornithidae), Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 81(4), 2007, pp. 457-462