@techreport{Ventura2000,
author = {Ventura, S.J. and Bachrach, C.A.},
title= {Nonmarital childbearing in the United States 1940-99},
year = {2000},
publisher = {National Center for Health Statistics},
address = {Hyattsville},
number = {National vital statistics reports; 48/16; 39 pp.},
}