TY  - BOOK
AU  - Moerdijk I
AU  - Vermeulen J J C
TI  - Proper maps of toposes
SN  - 0-8218-2168-7
U1  - 510 
PY  - 2000///
CY  - Providence
PB  - AMS
KW  - Mappings(Mathematics)
KW  - Toposes
ER  -