Owls (Strigiformes) Annotated and Illustrated Checklist - Weick, Friedhelm; SpringerLink (Online service) (Berlin, Heidelberg : Springer Berlin Heidelberg, 2006)
Keywords: Life sciences; Biodiversity; Zoology; Vertebrates; Life Sciences; Animal Systematics/Taxonomy/Biogeography.; Zoology; Vertebrates; Biodiversity