TY  - BOOK
AU  - Erich Gamma, Richard Helm
ED  - Ralph Johnson , John Vlissides
TI  - Design Patterns: Elements of Reusable Object Oriented Software
SN  - 9789332555402
U1  - 005.12 
PY  - 2018///
CY  - India
PB  - Pearson Education
KW  - Elements of Reusable Object Oriented Software
ER  -