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ACTIVITIES REPORT 
REGISTRY OF TUMORS IN LOWER ANIMALS: 
1975 SUPPLEMENT 
JOHN C. HARSHBARGER, DIRECTOR 
PREPARED FOR DISTRIBUTION BY: 
REGISTRY.OF TUMORS IN LOWER ANIMALS 
NATIONAL MUSEUM OF NATURAL HISTORY 
ROOM W-216A 
SMITHSONIAN INSTITUTION 
WASHINGTON, D.C. 20560 
Contract No. NOl-CB-33874; Contractor: Smithsoi 
