21. Telephone conversation with Dr. Visscher and Dr. Dennis Publication: Produced: 5 August 1966 Subject(s): Animal ExperimentationLegislation as Topic Archival Collection: The Clarence Dennis Papers (Profiles in Science)
22. Telephone conversation with Dr. Maurice Visscher Publication: Produced: 22 July 1966 Subject(s): Animal ExperimentationLegislation as Topic Archival Collection: The Clarence Dennis Papers (Profiles in Science)