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100   $a20001010d1972----km-y0itay50------ba
101 0 $aeng
105   $ay-------001yy
200 1 $aOperational methods in mathematical physics$fH. Jeffreys
205   $a2.ed.
210   $aNew York$cHafner Publishing Company$d1972
215   $aVI, 119 p.$d22 cm
225 1 $aCambridge tracts in mathematics and mathematical physics$v23
700  1$aJeffreys,$bHarold$012419
801  0$aIT$bUNINA$gRICA$2UNIMARC
901   $aBK
912   $a990000832930403321
952   $a02 65 D 7$b654$fFINBN
959   $aFINBN
996   $aOperational methods in mathematical physics$91548268
997   $aUNINA
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