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101 1 $aeng
102   $aUS
105   $aa---a---001yy
200 1 $aPell's equation$fE. J. Barbeau
210   $aNew York$cSpringer$dc2003
215   $axi, 212 p.$dcm24
225 1 $aProblem Books in Mathematics
610 0 $aTeoria dei numeri
610 0 $aEquazioni di Pell's
676   $a512.7$v21
700  1$aBarbeau,$bEdward J.$067749
801  0$aIT$bUNINA$gRICA$2UNIMARC
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