Post neonatal mortality a multicentre study undertaken by the Medical Care Research Unit, University of Sheffield
Knowelden, J.
Keeling, Jean.
Nicholl, J. P.
Emery, J. L.
Great Britain.Department of Health and Social Security.
University of Sheffield.Medical Care Research Unit.
London H.M.S.O.
1985
At head of title: Department of Health and Social Security
Newborn infants