TY  - BOOK
AU  - Gamma E.,
AU  - Helm R.
TI  - Design patterns elements of reusable object oriented software
SN  - 9788131700075
U1  - 005.18 
PY  - 1995/// c) 2011
CY  - New Delhi
PB  - Dorling Kindersley (India) Pvt.Ltd. Licensees of Pearson Education
KW  - Object Oriented Prog. & Comp. Graphics
ER  -