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2. An evidence-based health care system: the case for clinical trials registries : Office of Medical Applications of Research, National Institutes of Health [and] National Library of Medicine, Lister Hill Auditorium, Bethesda, Maryland, December 6-7, 1993

nlm:nlmuid-101120654-bk

6. Improving toxicology and environmental health information services: report of the Board of Regents

nlm:nlmuid-9305636-bk