TY  - BOOK
AU  - GAMMA, ERICH
TI  - DESIGN PATTERNS: ELEMENTS OF REUSABLE OBJECT-ORIENTED SOFTWARE 
SN  - 9788131700075
U1  - 005.8 O 12 GAM 
PY  - 2012///
CY  - NEW DELHI
PB  - PEARSON EDUCATION
ER  -