TY  - BOOK
AU  - Gamma, Erich…[et al.]
TI  - Design patterns : elements of reusable object-oriented software
SN  - 9788131700075
U1  - 005.12 
PY  - 2012///
CY  - New Delhi
PB  - Pearson
KW  - Comp.Sc. Engg
ER  -