【题 名】： The geography of non-integrated cargo airlines: an international study
            【作 者】：John Gardiner1, a, and Stephen Ison, a,
            【期刊、会议、单位名称】：Journal of Transport Geography
           【年, 卷(期), 起止页码】：Volume 16, Issue 1, January 2008, Pages 55-62
            【全文链接】：


http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VG8-4NJX435-4&_user=3616667&_coverDate=01%2F31%2F2008&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1583320622&_rerunOrigin=google&_acct=C000060973&_version=1&_urlVersion=0&_userid=3616667&md5=75aee624e4fb2b1b9f0df38d6635d67f&searchtype=a