000			00295nam a2200133Ia 4500
020			_a0 85226 091 1
082			_a001.433 COC/S
100			_aWilliam G Cochran
245			_aSampling Techniques
250			_a3rd
260			_c1989 _bWiley Eastern _aNew Delhi
300			_axvi+428
942			_cBK
999			_c17505 _d17505