@techreport{Martin2009,
author = {Martin, J. and Hamilton, B. and Sutton, P. and Ventura, S. and Menacker, F. and Kirmeyer, S.Mathews, T.},
title= {Births: Final data for 2006},
year = {2009},
publisher = {National Center for Health Statistics},
address = {Hyattsville, MD},
institution = {National Vital Statistics Reports },
number = {7},
}