MONSANTO COMPANY 
St. Louis, Missouri 
MYCOGEN CORPORATION 
San Diego, California 
PHARMACIA INC. 
Piscataway, New Jersey 
PHILLIPS PETROLEUM COMPANY 
Bartlesville, Oklahoma 
PORTON INTERNATIONAL 
London 
United Kingdom 
ROHM AND HAAS COMPANY 
Philadelphia, Pennsylvania 
SCHERING-PLOUGH CORPORATION 
Madison, New Jersey 
G. D. SEARLE & COMPANY 
Chicago, Illinois 
SHELL OIL COMPANY 
Houston, Texas 
STANDARD OIL COMPANY (Indiana) 
Naperville, Illinois 
TRANSGENE 
Paris 
France 
THE UPJOHN COMPANY 
Kalamazoo, Michigan 
[ 520 ] 
