TY  - BOOK
AU  - Gradwell,John B.
AU  - Welch,Malcolm
AU  - Martin,Eugene
TI  - Technology--shaping our world
SN  - 0870067540
AV  - T45 .G67 1991
U1  - 600 GRA 22
PY  - 1991///
CY  - South Holland, Ill.
PB  - Goodheart-Willcox
KW  - Technology
KW  - Applied sciences
ER  -