TY  - BOOK
AU  - Gibbs-Smith, Charles
AU  - Rees, Gareth
TI  - The Inventions of Leonardo Da Vinci
SN  - 0684157462
U1  - 604.2 
PY  - 1978///
CY  - New York
PB  - Charles Scribner's Son
KW  - Engineering drawings
KW  - Technological innovations
N1  - Bibliography : P. 103
ER  -