TY  - BOOK
AU  - Presence,Peter
TI  - Purnell's encyclopedia of inventions
SN  - 0361034954 :
U1  -  608.703 
PY  - 1976///
CY  - Maidenhead
PB  - Purnell
KW  - Technology
KW  - History
KW  - Inventions
N1  - Includes index
ER  -