Encyclopedieën

All the Birds of the World

Encyclopedieën

Handbook of the Birds of the World, Vol. 1, Ostrich to Ducks

Encyclopedieën

Handbook of the Birds of the World, Vol. 4, Sandgrouse to Cuckoos

Encyclopedieën

Handbook of the Birds of the World, Vol. 7, Jacamars to Woodpeckers

Encyclopedieën

Handbook of the Birds of the World Vol. 10, Cuckoo-shrikes to Thrushes

Encyclopedieën

Handbook of the Birds of the World, Vol. 13, Pendule-tits to Shrikes

Encyclopedieën

Handbook of the Birds of the World, Vol. 16, Tanagers to New World Blackbirds