TY  - BOOK
AU  - Marh H Dartford Penny Smith Donald Clarkhe
TI  - Illustrated Encyclopaedia Of Science Of Inverntion Val- l
SN  - NULL
U1  - N.D. 
PY  - 1989///
CY  - NULL
PB  - H. S Stuttman
KW  - NULL
ER  -