zhi wu bing li xue dao lun=: introduction to plant pathology/ Zhi wu bing li xue dao lun=: Introduction to plant pathology/ mo ca xue dao lun=: introduction to tribology/ Mo ca xue dao lun=: Introduction to tribology/ Jiao yu xin li xue xin lun =: On educational psychology/ jiao yu xin li xue xin lun =: on educational psychology/ zhi neng ke xue ji shu dao lun/: introduction to intelligent science and technology, Ren yin gong cheng xue dao lun=: An introduction to human factors engineering/ ren yin gong cheng xue dao lun=: an introduction to human factors engineering/ Kao gu xue dao lun =: A short introduction to archaeology/