TY  - BOOK
AU  - Hansen,H.J.
AU  - Sorensen,W.
TI  - On two orders of Arachnida: opiliones, especially the suborder Cyphophthalmi, and Ricinulei, namely the family Cryptostemmatoidae 
PY  - 1904///
CY  - Cambridge
PB  - at the University Press
ER  -