Pleistocene bears of North America 1. Genus Tremarctos, spectacled bears.
Kurtén, Björn
Pleistocene bears of North America 1. Genus Tremarctos, spectacled bears. - 120 p. ill. - Acta Zoologica Fennica 115 .
Pleistocene bears of North America 1. Genus Tremarctos, spectacled bears. - 120 p. ill. - Acta Zoologica Fennica 115 .