TY  - BOOK
AU  - Woods,Michael
AU  - Woods,Mary B.
TI  - Ancient machines: from wedges to waterwheels 
SN  - 0822529947
AV  - TJ147 .W66 2000
U1  - 621.8 21
PY  - 2000///
CY  - Minneapolis
PB  - Runestone Press
KW  - Simple machines
KW  - Juvenile literature
KW  - Machinery
KW  - History
N1  - Includes bibliographical references (p. 85) and index
N2  - Discusses the invention of six simple machines in various ancient civilizations from the Stone Age to the fall of the Roman Empire
ER  -