TY  - BOOK
AU  - Arlie O. petters, Harold Levine, Joachim Wambsganss
TI  - Singularity Theory and Gravitattional Lensing
SN  - 0-8176-3668-4
U1  - 522.6 
PY  - 2001///
CY  - Boston
PB  - Birkhauser
ER  -