@article{Smith1985,
author = {Smith, E.A. and Udry, J.R.},
title= {Coital and non-coital sexual behaviors of white and black adolescents},
year = {1985},
doi = {10.2105/AJPH.75.10.1200},
volume = {75},
number = {10},
pages = {1200--1203},
}