TY  - BOOK
AU  - Betten,Cornelius
AU  - Mosley,Martin Ephriam
ED  - British Museum (Natural History)
TI  - The Francis Walker types of Trichoptera in the British museum,
AV  - QL517.1 .B42
PY  - 1940///
CY  - London
PB  - Printed by order of the Trustees of the British museum
KW  - Walker, Francis,
KW  - Caddisflies
N1  - At head of title: British museum (Natural history); Includes bibliographies
ER  -