TY  - BOOK
AU  - Gamma, Erich
AU  -  Helm, Richard
AU  -  Johnson, Ralph
AU  -  Vlissides, John
TI  - Design patterns 
T2  - Addison-Wesley professional computing series
SN  - 978-0-201-63361-0
AV  - QA76.64.D47 
CY  - Reading
KW  -  Computer software--Reusability
KW  -  Software patterns
KW  - Computer science
KW  - Object--oriented programming (Computer science)
ER  -