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
2(20) O16741
United States. Department of Health, Education, and Welfare. Public Health Service Variance and covariance of life table functions estimated from a sample of deaths Washington: National Center for Health Statistics, 1967