TY  - BOOK
AU  -  Clark,Kenneth
TI  -  Leonardo da Vinci / 
U1  -  759.5 
PY  - 1959///]
CY  -  Baltimore, 
PB  -  Penguin Books, 
KW  -  Leonardo, 
N1  -  Includes bibliographical references (p. 165-168.)
ER  -