BioStor
 | Birds of Kenya and Uganda, being addenda and corrigenda to my previous paper in " Novitates Zoologica " xxix 1922 (1932) Novitates Zoologicae Tring 37: 252-380 |
 | Type-specimens of birds in the British Museum (Natural History). Vol. 2. Passerines Rachel L M Warren and C J O Harrison (1971) |