Demarcation of the Eco-geographical System Based upon the Extension Engineering Method——Taking Semi arid and Sub humid Areas in Mid temperate as an Example
ZHANG Jun tao, LI Zhe, ZHENG Du
Acta Geographica Sinica ›› 2001, Vol. 56 ›› Issue (1) : 24-31.
Demarcation of the Eco-geographical System Based upon the Extension Engineering Method——Taking Semi arid and Sub humid Areas in Mid temperate as an Example
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