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Science & Technology Review
1000-7857
1999 Issue 1
Progress in the Research of Comprehensive Forecasting of China's Natural Disasters
wang wei lin ; mao tong en ; jie jing
..............page:46-48
Five Fluctuations in China's Grain Supply and Demand
Wen Tiejun
..............page:3-5
Prospects for Nitrogen Fixation by Azotobacter
huang qun ce ; chen qi feng ; li zhi zhen
..............page:23-25