@techreport{Ventura1998,
author = {Ventura, S.J. and Curtin, S. and Mathews, T.J. },
title= {Teenage Births in the United States: National and State Trends, 1990-1996},
year = {1998},
publisher = {National Vital Statistics System, National Center for Health Statistics},
address = {Hyattsville, MD},
}