"World." . . "Habitats." . . "Fodring." . . "Vögel" . . "Vögel." . . . . "Encyclopedias"@en . . . . . . . "Guidebooks"@en . . "Guidebooks" . . . . "Reference works" . . . . . . . . . . . . . . . . . . . . "Handbook of the birds of the world" . "Handbook of the birds of the world"@en . . . . . . . . . . "Classification"@en . . . "Classification" . . . "Handbook of the birds of the world : / Alive" . . . "All manner of information about birds is presented. Following each lengthy description are full-color plates of typical members of each species with range-pattern maps for each family's genus and species." . "All manner of information about birds is presented. Following each lengthy description are full-color plates of typical members of each species with range-pattern maps for each family's genus and species."@en . . . . . . . . . . "Woordenboek. Repertorium" . . . . . . . . . . "Encyclopédies" . . . . . . "Birds of the world" . "Birds of the world"@en . . . . . . . . . . . . . . . . . . . . . . . . . "Verbreitung" . . "Ornithologie." . . "Natural distribution." . . "Verden." . . "Breeding." . . "Forædling, avl." . . "uccello [lista dei generi e delle specie]" . . "Levesteder." . . "International Council for Bird Preservation." . . "uccello [manuale]" . . "Billedværk." . . "Behaviour." . . "Ocells Guies." . . "Vogels." . . "Oiseaux Distribution géographique." . . "Systematik" . . "Aves Obras ilustradas." . . "Oiseaux Moeurs et comportement." . . "Aves." . . "Naturlig udbredelse." . . "Birds." . . "Oiseaux Identification." . . "Oiseaux Protection." . . "Illustrations." . . "Feeding." . . "Ocells." . . "Fugle." . . "fugle." . "Passeriformes (identificação)" . . "Migration." . . "Uccelli - Manuali." . . "Aves (identificação)" . . "Vögel 0 Gesamtdarstellungen." . . "Vögel 0 Gesamtdarstellung." . . "Taxonomy." . . "Taxonomie (Biologie)" . . "Oiseaux Encyclopédies." . . . . "Adfærd." . . "Taksonomi." . .