abet
poate Deal at at
Personal feme from
JOSHUA LEDERBERS

 

 

 

x pi 195% Dam Bt

9Jo:623

= a 19M — ent lreurt chs =

a oe
ee

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THE ROCKEFELLER UNIVERSITY NEW YORK 10021