00270nam a2200097Ia 4500008004100000082001500041100001900056245003900075260004500114300001300159190709s9999    xx            000 0 und d  a150.19 M68  aMarx, Melvin H 0aSystems and theories in psychology  aNew YorkbMcGraw - Hill Book Compac1963  axvii,489