196,684 International International Symposium on Pertussis. Proceedings of a Conference sponsored by Bureau of Biologies, PDA... November 1—3, 1978. National Institutes of Health. Bethesda, Maryland. Charles R.Manclark, James C. Hill, ed-s. Bethesda, 1978 U. S. Department of Health, Education, and Welfare; Public Health Service; National Institutes of Health 4C s. IX, nlb. 1, 387, il.