TY  - BOOK
AU  - Gamma, E.
AU  - Helm, R.
AU  - Johnson, R.
TI  - Design patterns elements of  reusable object-oriented software
SN  - 0201455633
PY  - 1995///
CY  - Reading, Massachusetts
PB  - Addison-Wesley
KW  - Design patterns
KW  - Object-oriented programming (Computer science)
ER  -