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100   $a20091012d1992----km-y0itay50------ba
101   $aeng
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105   $ay---||||001yy
200 1 $aCombinatorics of train tracks$fR. C. Penner$gwith J. L. Harer
210   $aPrincenton$cPrincenton university press$dcopyr. 1992
215   $a216 p.$d24 cm
225 2 $aAnnals of mathematics studies$v125
410  1$1001000315355$12001$aAnnals of mathematics studies$v125
606 0 $aAnalisi combinatoria
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700  1$aPENNER,$bR. C.$0606391
702  1$aHARER,$bJ. L.
801  0$aIT$bsalbc$gISBD
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996   $aCombinatorics of train tracks$91120684
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