Emergy Amalysis of Agricultural Eco-Economic System in Arid Region of Northwest China——A Case Study of Zhangye Prefecture in Heihe River
CHEN Dong-jing, XU Zhong-min
JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY . 2002, (4): 374 -379 .  DOI: 10.7522/j.issn.1000-0240.2002.0066

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