Etiqueta de registo: 00246nx b22000853 45
001 1111568
100 ## $a19890804apora0103 ba0
152 ## $aRPC
210 12 $aInternational Workshop on Slow Positron Beam Techniques for Solids and Surfaces,$d4,$eLondon,$f1990
801 #0 $aPT$bBN
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