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- [29] CERTAIN INEQUALITY RELATIONSHIPS AMONG THE COMBINATORIAL PARAMETERS OF INCOMPLETE BLOCK DESIGNS SANKHYA, 1943, 6 : 255 - 259
- [30] THE STRUCTURE OF BALANCED INCOMPLETE BLOCK DESIGNS, AND THE IMPOSSIBILITY OF CERTAIN UNSYMMETRICAL CASES ANNALS OF MATHEMATICAL STATISTICS, 1951, 22 (02): : 312 - 313