@techreport{Winkler2013c,
author = {Winkler, R.L. and Johnson, K.M. and Cheng, C. and Beaudoin, J. and Voss, P.R. and Curtis, K.J.},
title= {Age-specific net migration estimates for US counties, 1950-2010},
year = {2013c},
URL = {http://www.netmigration.wis.edu},
publisher = {Applied Population Laboratory, University of Wisconsin-Madison},
address = {Madison},
}