00796nam0-2200289---450-99000879195040332120090115122631.00-674-84371-1000879195FED01000879195(Aleph)000879195FED0100087919520090115d1992----km-y0itay50------baengUS--------001yyStructural holesthe social structure of competitionRonald S. BurtCambridgeHarvard University Press1992VIII, 313 p.23 cmBurt,Ronald S.118943ITUNINARICAUNIMARCBK9900087919504033211-6-563-TI9393ECAECAStructural holes261655UNINA