00299nam a2200121Ia 450000500170000000800410001704100120005808200180007010000240008824500390011226000180015130000080016920241221143421.0241221s9999||||xx |||||||||||||| ||und||  aEnglish  a658.4034bKER  aKerlinger, Fred. N. 0aFoundations of behavioral research  bSurjeetc2004  a741