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082 _a516 B694
100 _aBOLTYANSKII,V.G
245 0 _aENVELOPES
260 _aLONDON
_bPergamon Press
_c1964
300 _a22X14
490 _aPOPULAR LECTURES IN MATHEMATICS SERIES
942 _cBK
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999 _c12181
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