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- [5] EXPERIMENTAL-DESIGNS, 2ND EDITION - COCHRAN,WG, COX,GM AMERICAN JOURNAL OF PUBLIC HEALTH AND THE NATIONS HEALTH, 1958, 48 (03): : 397 - 398
- [9] ON THE EFFICIENCY OF EXPERIMENTAL-DESIGNS ANNALS OF MATHEMATICAL STATISTICS, 1960, 31 (01): : 242 - 242