TY  - BOOK
AU  - Becker, Katrin
AU  - Becker, Melanie
TI  - String theory and M-theory: a modern introduction
SN  - 0521860695
U1  - 530.1 
PY  - 2007///
CY  - Cambrdige
PB  - Cambridge  University Press
KW  - String models
KW  - String theory
ER  -