참고문헌
- Sampling Technique Cochran
- Ann. Math. v.20 On the determination of the optimum probabilities in sampling Hansen, M. H.;Hurwitz, W. N.
- Sampling : Design and Analysis Lohr, S.
- Elementary survey sampling Scheaffer, R. L.;Menderhall, w.;ott. L.
- Sampling Thompsom