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101 0 $aeng
200 1 $aData for protection against ionizing from external sources$ea report by Committee 3 of the ICRP, 1971
210   $aOxford [etc.]$cPergamon Press$d1973
225 1 $aICPR publication$v21
300   $aSupplement to ICRP publication 15
610 0 $aFisica nucleare
610 0 $aTecniche di misura e strumentazione
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710 02$aInternational commission on radiological protection$0298334
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