003260000a22001210004500060000800000082001900008100002100027245005000048260004300098260000900141300000800150650004600158  a100  a150.151 95 EDW  aEdwards, Allen L  aExperimental design in psychological research  aNewyork, Holt Rinehart and Winston Inc  c1950  a398  aExperimental design/ Research- Psychology