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024 _a11348
037 _cTextual
040 _aSDCL
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041 _2eng
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082 _aB2817, N9
100 _aCochran William G
_9466606
245 0 _aSampling techniques.
250 _a3.
260 _c1999
942 _hB2817, N9
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999 _c813779
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