@techreport{Ventura2001,
author = {Ventura, S.J. and Martin, J.A. and Curtin, S.C. and Menacker, F. and Hamilton, B.E. },
title= {Births: Final Data for 1999},
year = {2001},
publisher = {National Center for Health Statistics},
address = {Hyattsville, MD},
institution = {National Vital Statistics Reports 49(1)},
}