ACTIVITIES REPORT 
REGISTRY OF TUMORS IN LOWER ANIMALS 
1977 SUPPLEMENT 
JOHN C. HARSHBARGER, DIRECTOR 
PREPARED FOR DISTRIBUTION BY; 
REGISTRY OF TUMORS IN LOWER ANIMALS 
NATIONAL MUSEUM OF NATURAL HISTORY 
ROOM W216A 
SMITHSONIAN INSTITUTION 
WASHINGTON, D.C. 20560 
NIH Contract #N01-CB-33874; Contractor; Smithsonian Institution 
