00318nam a2200133Ia 4500008004100000041000800041082001500049100002600064245003000090250000600120260003600126300001300162650000900175210716s1961    xx            000 0 und d  aeng  a304.2 THEG  aTheodorson, George A.  aStudies in human ecology.  a1  aNew  YorkbHarper and Rowc1961  axiii,626  aNone