10.18170/DVN/ZGNTIZResearch Group from Policy Research Center of Ministry of Civil Affairs of the People’s Republic of ChinaNational Survey of Urban Low Income Families-欧美大片ppt免费大全Peking University Open Research Data Platform2017Social SciencesAdministratorChina Survey Data Archive2017-05-292017-06-0768312application/pdf1.0CC0 WaiverNational Survey of Urban Low Income Families