全英文网站，看懂了有大量标准可以下载
Dear friends:Do you know how to find out database quickly without entering so many university libraries and search the web again and again? Do you know what databases does a library have? You will recommend google search engine, but does it provide you enough and prcise information? No!So we made up this handbook for you guys as an index of library resource menu, for you to get to any database or journal without entering lots of university librares.you can go tohttp://www.passfans.com/forum/?fromuid=100068 好东西啊. 还要注册,不是很方便.
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