00295nam a2200109Ia 4500008004100000082001600041100001800057245003200075260002800107300001000135440004000145190415s9999    xx            000 0 und d  a364.3 LIG-;  aLiggett, John 0aExercises in social science  aLondonbConstablec1968  a308p.  aSociology and social welfare series