000 00272nam a2200121Ia 4500
008 190216s9999||||xx |||||||||||||| ||und||
100 _aWilliam G Cochran
245 0 _aSampling Techniques
250 _a3RD
260 _bNull
_c1977
650 _aMathematics
942 _cBK
999 _c30862
_d30862