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28Dali L Yang,Calamity and reform in China :State,Rural Society,and Institutional Change Since the Great Leap Famine.,38.
29Dali L Yang,Calamity and reform in China :State,Rural Society,and Institutional Change Since the Great Leap Famine,257-258.
30Dali L Yang,Calamity and reform in China :State,Rural Society,and Institutional Change Since the Great Leap Famine,57,63.