?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Janmaat&rft.au=Janmaat%2C+L.&rft.aufirst=L.&rft.date=2014&rft.degree=Master&rft.title=How+does+the+rural+to+urban+migration+contribute+to+the+environmental+degradation+in+Beijing%3F