TY  - JOUR
A1  - Santelli, J.
A1  - Lindberg, L.D.
A1  - Finer, L.B.
A1  - Singh, S.
T1  - Explaining recent declines in adolescent pregnancy in the United States: The contribution of abstinence and improved contraceptive use
Y1  - 2007
DO  - 10.2105/AJPH.2006.089169
JF  - American Journal of Public Health
VL  - 97
IS  - 1
SP  - 150
EP  - -156

ER  -