TY  - JOUR
AU  - Leo Harrington
TI  - Extensions of countable infinitary logic which preserve most of its nice properties.
JO  - Archiv für mathematische Logik und Grundlagenforschung
PY  - 1980
SP  - 95
EP  - 102
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AMLG_1980__20_137964/
ID  - AMLG_1980__20_137964
ER  -