@techreport{Lepkowski2006,
author = {Lepkowski, J. and Mosher, W.D. and Davis, K.},
title= {National Survey of Family Growth, Cycle 6: Sample Design, Weighting, Imputation, and Variance Estimation.},
year = {2006},
publisher = {National Center for Health Statistics},
address = {Hyattsville, MD},
institution = {Vital and Health Statistics, Series 2, No. 142},
}