000			00606 a2200229 4500
999			_c29325 _d29325
003			WUSLLib
008			200904b ||||| |||| 00| 0 eng d
020			_a047116240X
041			_aEnglish
082			_a001.4222 _bCOC
100			_aCochran, William G. _916366
245			_aSampling techniques
250			_a3rd ed.
260			_aNew York: _bJohn Wiley & Sons, _c1977
300			_axvi, 428p.; _c24cm.
650			_aKnowledge _967
650			_aResearch _966
650			_aCollection of data _916326
650			_aStatistical methods _99319
650			_aResearch methods _91503
942			_cSR _2ddc