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CHARACTERISTICS OF REGIONAL PRED SYSTEM AND CHOICES OFCOUNTERMEASURES OF SUSTAINABLE AGRICULTURE DEVELOPMENT—A case study of Dongchangfu county of Shandong province
WANG Yun-cai, GUO Huan-cheng
Arid Land Geography . 2000, (4): 358 -363 .  DOI: 10.13826/j.cnki.cn65-1103/x.2000.04.013