00319nam a2200121Ia 450000500170000000800410001704100080005808200130006610000180007924500420009726000490013930000090018820260720174724.0260720s1992    xx            000 0 und d  aeng  a150 ELMR  aElmes David G  aResearch methods in psychology,4th ed  aSan FransiscobWest publishing companyc1992  a408p