TY  - BOOK
AU  - Erich Gamma,Richard Helm,Ralph Johnson
TI  - Design Patterns Elements Of Reusable Object Oriented Software 
SN  - 9789332555402
U1  - 005.117 
PY  - 2016///
CY  - Noida
PB  - Pearson
KW  - COMPUTER
ER  -