000			00396nam a2200145Ia 4500
008			180712s9999 xx 000 0 und d
020			_a30133319
082			_a150.72 _bKER
100			_aKerlinger, Fred N.
245			_aBehavioral research: a conceptual approach
260			_aChigaco _bHolt, Rinehart and Winston _c1979
300			_axvi, 336 p.
650			_aPsychological research
942			_cS
999			_c5523 _d5523