@techreport{Gansu Provincial Bureau of Statistics2007,
author = {Gansu Provincial Bureau of Statistics},
title= {Gansu migrant survey report (in Chinese)},
year = {2007},
URL = {http://www.gstj.gov.cn/doc/ShowArticle.asp?ArticleID=221},
publisher = {Gansu Provincial Bureau of Statistics},
address = {Lanzhou},
}