共 9 条
 
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                COCHRAN, 1936, EMP J EXP AGR, V4, P69
              
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                 DWYER, 1938, ANN MATH STAT, V9, P1
              
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                 IRWIN, 1938, J R STAT SOC S, V5, P1
              
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                 KISER, 1934, J AM STAT ASS, V29, P250
              
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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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                 YATES, 1935, ANN EUGEN, V6, P202
              

