The Francis Walker types of Trichoptera in the British Museum /
Betten, Cornelius, 1877-
The Francis Walker types of Trichoptera in the British Museum / re-described and figured by Cornelius Betten and Martin E. Mosely - London : British Museum, 1940 - ix, 248 p. : ill. ; 26 cm.
At head of title: British Museum (Natural History)
Walker, Francis, 1809-1874
Caddis--flies
The Francis Walker types of Trichoptera in the British Museum / re-described and figured by Cornelius Betten and Martin E. Mosely - London : British Museum, 1940 - ix, 248 p. : ill. ; 26 cm.
At head of title: British Museum (Natural History)
Walker, Francis, 1809-1874
Caddis--flies