TY  - BOOK
TI  - How was it done?: the story of human ingenuity through the ages 
SN  - 0276421922
AV  - AG 5  .H847 1995
PY  - 1995///
CY  - New York
PB  - The Reader's Digest association Lmtd.
N1  - Basic Ed. Students
N2  - 1. Civilization
ER  -