@inbook{Liang2007,
author = {Liang, Z.},
title= {Internal migration: Policy changes, recent trends, and new challenges},
year = {2007},
doi = {10.1093/acprof:oso/9780199299294.001.0001},
editor = {Zhao, Z.},
editor = {Guo, F.},
booktitle = {Transition and challenge: China’s population at the beginning of the 21st century},
address = {Oxford},
publisher = {Oxford University Press},
pages = {197--215},
}