@book{Freedman2009,
author = {Freedman, R. and Campbell, A.A. and Whelpton, P.K.},
title= {Growth of American families 1955},
year = {2009},
doi = {10.3886/ICPSR20000.v2},
address = {Ann Arbor},
publisher = {Inter-University Consortium for Political and Social Research},
}