Questions and Answers Inventions: How? Why? Where? When?
(Parragon Inc Oct. 1, 2007)
Answers questions about inventions and innovations related to farming, construction, energy, manufacturing, transportation, navigation, space, weapons, medicine, time, communications, and entertainment.
- 140549462X / 9781405494625
- 38.4 oz.
- 9.0 x 0.8