Highs and lows in breast-feeding rates.
Hoekelman
R A
RA
D001942:Breast Feeding / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007223:Infant; D007225:Infant Food; D007227:Infant Nutritional Physiological Phenomena; D007231:Infant, Newborn; D014481:United States