TY  - BOOK
AU  - Bell,J.L.
AU  - Slamson,A.B.
TI  - Models and ultraproducts: an introduction 
SN  - 0720420547
PY  - 1969///
CY  - Amsterdam
PB  - North-Holland Publishing Company
KW  - Model theory
KW  - Ultraproducts
N1  - Bibliography : p. 309-315
ER  -