Notes on the birds of East AfricaPublished in Novitates Zoologicae, in 1922, in volume 29, pages 1-246New and little-known GeometridaePublished in Novitates Zoologicae, in 1922, in volume 29, pages 327-363A monograph of the Saturnian subfamily LudiinaePublished in Novitates Zoologicae, in 1922, in volume 29, pages 249-326
New and little-known GeometridaePublished in Novitates Zoologicae, in 1922, in volume 29, pages 327-363A monograph of the Saturnian subfamily LudiinaePublished in Novitates Zoologicae, in 1922, in volume 29, pages 249-326
A monograph of the Saturnian subfamily LudiinaePublished in Novitates Zoologicae, in 1922, in volume 29, pages 249-326