TY  - BOOK
AU  - 
ED  - Encyclopaedia Britannica 
TI  - Inventions: get the inside story on gadgets and systems past and present 
SN  - 9788184970678
U1  - 609 23rd ed.
PY  - 2009///
CY  - New Delhi
PB  - BPI India
KW  - Invention
KW  - Juvenile literature
N1  - Glossary available
ER  -