Ami期刊分为顶级、权威、 核心、 扩展及入库五个档次。 而其中只有“顶级、权威、 核心”这三个档次从权威性上可以认定为类核心目录，且这三个档次收录的期刊基本也同时.
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Ami James' Unexpected Collaboration: Is This The End Of His Career? Down With Wilco Story An Collaboration Youtube
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