1. Suggested procedure for potency testing of poliomyelitis vaccine: 18 November 1957 Author(s): National Institutes of Health (U.S.). Division of Biologics Standards, author. Publication: [Geneva] : World Health Organization, Study Group on Recommended Requirements for Poliomyelitis Vaccine, 2 June 1958 Subject(s): Poliovirus Vaccine, Inactivated -- analysisPoliovirus Vaccine, Inactivated -- standardsEvaluation Studies as TopicVaccine Potency