TY  - BOOK
AU  - Gamma, Erich; Helm, Richard ; Johnson, Ralph ; Vlissides, John
TI  - Design Patterns
SN  - 978-93-325-5540-2
U1  - 5.12 
PY  - 2016///
CY  - UP
PB  - Pearson India Education Services Pvt. Ltd
ER  -