TY  - JOUR
A1  - Billy, J.O.G.
A1  - Udry, J.R.
T1  - Patterns of adolescent friendship and effects on sexual behavior
Y1  - 1985
DO  - 10.2307/3033779
JF  - Social Psychology Quarterly
VL  - 48
IS  - 1
SP  - 27
EP  - -41

ER  -