TY  - BOOK
AU  - Keene, G. B
TI  - Abstract sets and finite ordinals : an introduction to the study of set theory
SN  - 9780486462493
U1  - 511.322 KEE 
PY  - 2007///
CY  - Mineola, NY
PB  - Dover Publications
KW  - Logic, Symbolic and mathematical
ER  -