TY  - BOOK
AU  - Gamma, Erich.
AU  - Helm, Richard.
AU  - Johnson, Ralph.
AU  - Vlissides, John.
TI  - Design patterns: elements of reusable object-oriented software 
SN  - 9788131700075
U1  - 005.364 1
PY  - 2011///
CY  - New Delhi
PB  - Pearson Education
KW  - Design pattern catalog
KW  - Behavioral patterns
KW  - Creational patterns
ER  -