@article{Upchurch1998,
author = {Upchurch, D. and Levy-Storms, L. and Sucoff, C. and Aneshensel, C.},
title= {Gender and ethnic differences in the timing of first sexual intercourse},
year = {1998},
doi = {10.1363/3012198 },
journal = {Family Planning Perspectives},
volume = {30},
number = {3},
pages = {121--127},
}