By 肖翠娥   in Advances in Education

ISSN:2160-7303|02|01|1-5

汉斯出版社‎(2012)‎

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By 肖翠娥   许友军   in Pure Mathematics

ISSN:2160-7605|01|02|144-148

汉斯出版社‎(2011)‎

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