TY  - BOOK
AU  - Wright, R. T.
AU  - Smith, H. B.
TI  - Understanding technology
SN  - 9780870069055
AV  - DUCE T47.W75 
PY  - 1993///
CY  - South Holland
PB  - The goodheart-Willcox
KW  - Science
N1  - Include index
ER  -