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100|  |□a20010418d1980    demy0chiy0121    ea
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200|10|□a北京市中学数学竞赛题解□Abei jing shi zh-
   |  |ong xue shu xue jing sai ti ji-
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210|  |□a北京□c科学普及出版社□d1980
215|  |□a127页□d19cm
225|2 |□a数理化竞赛丛书
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606|  |□a数学-竞赛题□x解题□x中学□y北京□z1956-1979
606|  |□a竞赛题-数学□x解题□x中学□y北京□z1956-1979
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711|02|□a北京市数学会□4编□Abei jing shi shu xue hui
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