TY  - GEN
TI  - Levels and trends of contraceptive use as assessed in 1998
SN  - 92-1-151348-0
U1  - 613.943 L6571l 1998 
PY  - 2001///
CY  - New York, [EE.UU.] : 
PB  - United Nations, 
KW  - ANTICONCEPTIVOS
KW  - CONCEPCIÓN
KW  - PREVENCIÓN
KW  - ESTADÍSTICA
ER  -