 PDF(486 KB)
						
							PDF(486 KB) 
						
						
					 
			 PDF(486 KB)
						
							PDF(486 KB) 
						
						
					 PDF(486 KB)
						
							PDF(486 KB) 
						
						
					北方土石山区坡耕地水土保持措施的空间有效配置
Study on optimized patterns of soil and water conservation measures on sloping fields in earth-rocky mountainous area of northern China
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