@techreport{Parsons2007,
author = {Parsons, C. and Skeldon, R. and Walmsley, T. and Winters, A.},
title= {Quantifying international migration: a database of bilateral migrant stocks},
year = {2007},
publisher = {The World Bank},
address = {Washington D.C.},
number = {Policy Research Working Paper 4165},
}