 PDF(378 KB)
						
							PDF(378 KB) 
						
						
					 
			Study on the Influencing Factors of Grain Production in Hebei Province Based on Gray Correlation Degree Method 
						WANG Shu-tao,LI Xin-wang,MEN Ming-xin,XU Hao
					
 PDF(378 KB)
						
							PDF(378 KB) 
						
						
					 PDF(378 KB)
						
							PDF(378 KB) 
						
						
					Study on the Influencing Factors of Grain Production in Hebei Province Based on Gray Correlation Degree Method 
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