TY  - BOOK
AU  - Troeng,John
TI  - Worldwide chronology of fifty-three prehistoric innovations
SN  - 91-22-01569-8
AV  - GN799.T6T76 
PY  - 1993///
CY  - Stockholm 
PB  -  : Almqvist and Wiksell
KW  - Tools, Prehistoric,
KW  - Technological innovations - History,
KW  - Antiquities - Prehistoric
ER  -