000			00294nam a22001337a 4500
008			171009b xxu||||| |||| 00| 0 eng d
020			_a0125928643
041			_aeng
080			_a159.9
100			_a49
101			_aPSI
245			_aUNDERSTANDING DEVELEPIMENT _cSCAR.S
942			_2udc _cBK
999			_c32513 _d32513