TY  - BOOK
AU  - Mattheus Marinus Schepman
TI  - The Prosobranchia, Pulmonata and Opisthobranchia Tectibranchiata, tribe Bullomorpha, of the Siboga expedition / 
PY  - 1913///
CY  - Leyden : 
PB  - E.J. Brill, 
ER  -