TY  - JOUR
A1  - Haydon, A.A.
A1  - Herring, A.H.
A1  - Halpern, Prinstein, M.J.
A1  - Halpern, C.T.
T1  - Beyond age at first sex: Patterns of emerging sexual behavior in adolescence and young adulthood
Y1  - 2012
DO  - 10.1016/j.jadohealth.2011.09.006
VL  - 50
IS  - 5

ER  -