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Fleming WE, 1936, J AGRIC RES, V53, P0319
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KALAMKAR RJ, 1932, J AGR SCI, V21, P783
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On the two different aspects of the representative method: The method of stratified sampling and the method of purposive selection.
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TIPPERT LHC, 1927, RANDOM SAMPLING NUMB
[10]
[No title captured]