文章摘要
Analysis on several influencing factors of output of Grain in Henan Province
  
DOI：10.3969/j.issn.1004-874X.2009.07.109
Author NameAffiliation
李瑞华, 李明秋 河南理工大学测绘与国土信息工程学院,河南焦作,454000 
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