TY  - BOOK
AU  - ERICH GAMMA
TI  - DESIGN PATTERNS ELEMENTS OF REUSABLE OBJECT- ORIENTED SOFTWARE
SN  - 9789332555402
U1  - 005.12 Q6 GAM 
PY  - 2016///
PB  - PEARSON EDUCATION
KW  - SOFTWARE SYSTEM ANALYSIS & DESIGN
ER  -