TY  - BOOK
AU  - Surdej, J.
AU  - Fraipont-Caro, D. 
AU  - Gosset, E.
ED  - Liege international astrophysical colloquium
TI  - Gravitational lenses in the universe: proceedings of the 31st Liege international astrophysical colloquium June 21-25, 1993 
PY  - 1993///
CY  - Liege
PB  - Institute d'Astrophysique, 
KW  - Gravitational lenses
KW  - Universe
N1  - Includes bibliographical references and indexes
ER  -