000 00338nam a2200145Ia 4500
020 _a047116240X
082 _b312.
_a310
100 _a"Cochran,William.G"
245 0 _aSampling Techniques
260 _bjohn Wiley & Sons
_aUSA
_c1977
300 _a428
944 _cBK
999 _c750894
_d750894