TY  - BOOK
AU  - Gamma, Erick, Helm, Richard, Johnson, Ralph 
TI  - Design patterns 
SN  - 81-7808-135-0 
U1  - 005.13 GAM  
PY  - 2005///
CY  - Pearson education asia 
PB  - New Delhi 
KW  - PROGRAMMING LANGUAGE
ER  -