"Fauna. Zoölogische determinatiewerken." . . . . "Vogels." . . . . . "The birds of Africa : comprising all the species which occur in the Ethiopian region"@en . . . "Birds of Africa"@en . "The birds of Africa comprising all the species which occur in the Ethiopian region"@en . . "The Birds of Africa, comprising all the species which occur in the ethiopian region" . . . . "The birds of Africa" . . . . . . . . . . . . . . "Classification"@en . . . "The birds of Africa, comprising all the species with occur in the Ethiopian region" . . "The birds of Africa, comprising all the species which occur in the Ethiopian region : Vol. I-V. With plates" . "The birds of Africa, comprising all the species which occur in the Ethiopian region"@en . "The birds of Africa, comprising all the species which occur in the Ethiopian region" . "Afrika." . .