正安县野木瓜产业化发展经营模式的法经济学分析
Juristic Economics Analysis of Business Mode of Wild Papaya 's Industrialized Development in Zhengan County
喀斯特边远农区正安县植烟土壤重金属含量及其特征
Contents and Its Characters of Heavy Metals with Tobacco-Growing Soils in Zhengan County of Remote Karst Agricultural Area