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100|  |▼a19920916a19719999m  y0engy0120    ba
101|0 |▼aeng
102|  |▼aUSA
110|  |▼aaza    0uu0
200|10|▼aJournal of combinatorial the-
   |  |ory,series A
207| 0|▼av.10 (1971)-
210|  |▼aNew York, N.Y.▼cAcademic Press
431|  |▼12001▼a0021-9800
530|0 |▼aJournal of combinatorial the-
   |  |ory. Series A
531|  |▼aJ. comb. theory, Ser. A
541|1 |▼a（美）组合理论杂志．A辑
690|  |▼aO157
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