TY  - BOOK
AU  - Tomecek, Stephen M.
AU  - Stuckenschnelder, Dan
TI  - What a great idea! : : Inventions that changed the world 
SN  - 9780439609654
AV  - T15 .T695 
U1  - 609 
PY  - 2003///.
CY  - New York : 
PB  - Scholastic
KW  - Renaissance history
KW  - Non-fiction
KW  - Medieval history
N2  - Profiles forty-five historic and prehistoric inventions, explaining how they work and describing their origins and impact. Includes such developments as the hand ax, the axle, writing, money, the clock, anesthesia, and the nuclear reactor
ER  -