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历史时期黄河中游环境变迁与下游水患问题的研究
赵淑贞, 任伯平
RESEARCH ON ENVIRONMENTAL CHANGES IN THE MIDDLE REACHES OF YELLOW RIVER AND FLOODS IN THE LOWER REACHES IN HISTORIC TIMES
ZHAO Shu zhen, REN Be ping
中国沙漠 . 1998, (4): 346 -349 .