[Perinatal mortality in relation to duration of pregnancy and weight of infant at birth].
Explore the source record for details and available documents.
Adolescent↗
Biomedical subjects
J E Backer
Publications and source records attributed to J E Backer.
[Regional differences in infant mortality, 1961-1964].
Explore the source record for details and available documents.
Female↗
Infant mortality problems in Norway.
Explore the source record for details and available documents.
Adolescent↗