TY  - BOOK
AU  - Gamma,Erich 
AU  - Helm, Richard
AU  - Johnson, Ralph
AU  - Vlissides, John
TI  - Design Patterns: Elements of Reusable Object-Oriented Software
SN  - 9789332555402
U1  - 005.12 GAM 
PY  - 2025///
CY  - Noida
PB  - Pearson
ER  -