LEADER 00418nam##22001337##450# 001 9910551530003321 010 $a9788860819819 100 $a########d########u##y0engy50####ba 105 0 $a########00### 200 1 $aIntorno al problema del progresso / Robert Michels, a cura di Raffaele Federici. 700 $aMichels, Robert.$0119416 912 $a9910551530003321 996 $aIntorno al problema del progresso$92796900 997 $aUNINA