TY  - BOOK
AU  - Muller G H
TI  - Sets and classes : on the work by Paul Bernays,1976
SN  - 0-7204-2284-1
U1  - 511.32 
PY  - 1976///
CY  - Amsterdam
PB  - North-Holland
KW  - Mathematical logic
KW  - Set theory
ER  -