TY  - BOOK
AU  - Williams,Neil H
TI  - Combinational set theory
SN  - 0720407222
U1  - 517.521 WIL 
PY  - 1977///.
CY  - Amsterdam : 
PB  - North Holland Publishing Company, 
KW  - Combinational set theory
KW  - Set theory
ER  -