TY  - BOOK
AU  - GAMMA, ERICH
TI  - DESIGN PATTERNS: ELEMENTS OF REUSABLE OBJECT ORIENTED SOFTWARE 
SN  - 817808135-0
U1  - 005.8 O 04 GAM/HEL 
PY  - 2004///
CY  - NEW DELHI
PB  - PEARSON EDUCATION ASIA PUBLISHING HOUSE
ER  -