00287nam a2200097Ia 4500008004100000040003800041100002000079245003100099260004100130653001800171211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aParsons,Talcott 0aStructure of social action  bGeorge Allen and UnwinaLondonc1949  aSocial action