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晶体管电路[M]. 科学出版社 , 黄昌宁, 1983
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Determination of soil solution electrical conductivity from bulk soil electrical conductivity measurement by four -electrode method. Nadler,A,Frenkel,H. Soil Science Society of America Journal . 1980
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水分检测的原理与装置[M]. 中国计量出版社 , (苏)克里切夫斯基(Кричевский,Е.С.)著, 1986
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High frequency moisture probe. Galfy,J. Process Control Automation . 1984
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Theories and tests of electrical conductivity in soil. Bohn,HL,Ben-Asen,J,Hadi,ST et al. Soil Science Society of America Journal . 1982