TY  - BOOK
AU  - Gamma Erich
AU  - Helm Richard Johnson Ralph Vlissides John
TI  - Design Patterns: Elements of Resouable. Object Oriented Software
SN  - 9788131700075
U1  - 005.12              
PY  - 1995///
CY  - New Delhi
PB  - Pearson Publications
KW  - Computer program design005.12
ER  -