TY  - BOOK
AU  - Trease,Geoffrey
TI  - Timechanges
SN  - 0531092305
PY  - 1985///
CY  - New York
PB  - Warwick Press
KW  - Inventions
KW  - Technology
KW  - Social change
KW  - Civilization
KW  - sears
ER  -