TY  - BOOK
AU  - Weber,Robert J.
TI  - Forks, phonographs and hot air ballons: a field guide to invention 
SN  - 019506402X
PY  - 1992///
CY  - New York
PB  - Oxford University Press
KW  - Inventions
KW  - Creative thinking
N1  - p. 266-272
ER  -