TY  - BOOK
AU  - Calder,Ritchie
TI  - Leonardo & the age of the eye
SN  - 067120713X
AV  - ND623.L5 R62
U1  - 759.5B 
PY  - 1970///]
CY  - New York
PB  - Simon and Schuster
KW  - Leonardo,
N1  - Bibliography: p. 278
ER  -