Etiqueta de registo: 00289nx b2200109 45
001 211250
095 ## $aPTBN00176840
100 ## $a19960402apory0103 ba
102 ## $aDE
152 ## $aRPC
210 12 $aInternational Symposium Empirical Research in Chemistry and Physics Education,$eGermany,$f1992
801 #0 $aPT$bBN
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