TY  - BOOK
AU  - Gamma, Erich
AU  - Helm, RichardGamma, Erich
TI  - Design Patterns :  Elements of Reusable Object Oriented Software    
SN  - 9788131700075
AV  - 5.122 
U1  - 5.122 
PY  - 1995///
CY  - Pearson
PB  - New Delhi
KW  - Computer Engineering
ER  -