Inventions
Holt, Michael
Inventions - London Belitha Press Limited, 1990 - 61 - Belitha information library .
Explains the nature of inventions and patents. Discusses major inventions in the past such as the telephone, radio, the first aeroplane, the electric generator and goes back in time to early tool-making and development of the wheel and sailing ship. Suggested level: intermediate, secondary
1855610140
000 / BEL
Inventions - London Belitha Press Limited, 1990 - 61 - Belitha information library .
Explains the nature of inventions and patents. Discusses major inventions in the past such as the telephone, radio, the first aeroplane, the electric generator and goes back in time to early tool-making and development of the wheel and sailing ship. Suggested level: intermediate, secondary
1855610140
000 / BEL