TY  - JOUR
AU  - Robert Fittler
TI  - Categories with Ultraproducts
JO  - Commentarii mathematici Helvetici
PY  - 1973
SP  - 100
EP  - 115
VL  - 48
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1973__48_139540/
ID  - CMH_1973__48_139540
ER  -