Breast-feeding habits and their relation to infant mortality and marital fertility.
Lithell
U B
UB
D002669:Child Welfare / Q000266:history*; D003710:Demography; D004032:Diet / Q000266:history*; D049711:History, Modern 1601-; D009747:Nutritional Physiological Phenomena; D013223:Statistics as Topic / Q000266:history*; D013548:Sweden