TY  - BOOK
AU  - GAMMA, E. / HELM, R. 
TI  - DESIGN PATTERNS ELEMENTS OF REUSABLE OBJECT - ORIENTED SOFTWARE
U1  - 5.12 
PY  - 2016/// R.P. 2022
PB  - PEARSON INDIA LTD SOUTH ASIA
KW  - AI AND DS
N1  - GE/PI007
ER  -