TY  - BOOK
AU  - Gamma, Erich
AU  - Helm, Richard
AU  - Johnson, Ralph
AU  - Vlissides, John
TI  - Design patterns: elements of reusable object-oriented software
SN  - 8178081350
U1  - 005.12 
PY  - 1995///
CY  - Delhi
PB  - Pearson Education
KW  - Patern perceipton; Software engineering
ER  -