PDF(544 KB)
The Development Tendency and the Regional Differences of Grain Production in Hebei Province
WU Kai, YUAN Zhang, XU Yuexian
PROGRESS IN GEOGRAPHY ›› 2003, Vol. 22 ›› Issue (5) : 499-506.
PDF(544 KB)
PDF(544 KB)
The Development Tendency and the Regional Differences of Grain Production in Hebei Province
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