http://doc.paperpass.com/journal/20070228nytsqbxk.html
doc.paperpass.com
全网免费
http://epub.cnki.net/grid2008/docdown/docdownload.aspx?filename=LYTS200701028&dbcode=CJFD&year=2007&dflag=pdfdown
epub.cnki.net
全网免费
http://www.zhangqiaokeyan.com/academic-journal-cn_agricultural-library-information_thesis/02012550491.html
掌桥科研
全网免费
http://www.cqvip.com/Main/Confirm.aspx?id=23663979
维普网
全网免费
http://wenku.baidu.com/view/674497d9fbc75fbfc77da26925c52cc58bd690c1
百度文库
全网免费