Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
O21382
United States., Dept. of Health, Education, and Welfare. Public Health Service Seasonal variation of births: United States, 1933-63 Washington, D.C.: National Center for Health Statistics, 1966 - (Vital and Health Statistics 21-9) * Administrative Report * Series