TY - JOUR A1 - Goméz de León, J. A1 - Potter, J.E. T1 - Modelling the inverse association between breastfeeding and contraceptive use Y1 - 1989 DO - 10.1080/0032472031000143856 JF - Population Studies VL - 43 IS - 1 SP - 69 EP - -93 ER -