00339nam a2200133Ia 4500008004100000020001400041082001400055100001500069245003700084260003600121300000800157650002000165653002000185170901s1970    xx            000 0 und d  a39444017X  a300bR99P  aRyan, Alan 0aPhilosphy of the Social Sciences  aNew YorkbPanthenon Booksc1970  a249  aSocial sciences  aSocial sciences