References
- Cochran , W. G. , Sampling Techniques, , Second Edition , John Wiley and Sons , New York , 1961 .
- Cox , D. R. , “ Estimation by Double Sampling ,” Bimelrika , Volume 39 , 1952 .
- Stein , C , “ A Two-Sample Test for a Linear Hypothesis Whose Power Is Independent of the Variance ,” Annals of Mathematical Statistics , Volume 16 , 1945 .
- Wilks , S. S. , Mathematical Statistics , John Wiley and Sons , New York , 1962 .