00330nam a2200109Ia 4500008004100000040003800041100001800079245004900097260004100146300001200187653002100199220119s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aHirst, Paul Q 0aSocial evolution and sociological categories  bGeorge Allen and UnwinaLondonc1976  a135p p.  aSocial evolution