TY  - JOUR
AU  - Harvey Wolff
TI  - On the External Characterization of Topological Functors.
JO  - Manuscripta mathematica
PY  - 1977
SP  - 63
EP  - 76
VL  - 22
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1977__22_154481/
ID  - MM2_1977__22_154481
ER  -