ay at A, 
CF bie 
W4 
Sear. 
a 
1970 — 
a a yy 1967 
ae ge utes t vele as eat pee tudy ae eding distribution o 
Illin oe rs, ae ee a e spec sudy pee e dai are es 
of pees s an aa popu A of bi ae we staat , 1967- 1970. 
