Filtering by: Contributor Hershey, Nathan Remove constraint Contributor: Hershey, Nathan Collection PA Implementation Era (1966-1972) Remove constraint Collection: PA Implementation Era (1966-1972) Subject National Academy of Sciences (U.S.). Board on Medicine. Ad Hoc Panel on New Members of the Physician's Health Team Remove constraint Subject: National Academy of Sciences (U.S.). Board on Medicine. Ad Hoc Panel on New Members of the Physician's Health Team Subject Stead, Eugene A. Remove constraint Subject: Stead, Eugene A.