A Numbering System for Permutations of Combinations CACM June, 1976 Knott, G. D. combinatorics,coding systems, storage mapping functions 4.9 5.30 CA760609 JB January 4, 1978 1:33 PM 2690 4 2853 2853 4 2853 2853 4 2853 3115 4 2853 2690 5 2853 2853 5 2853 2853 5 2853 2853 5 2853 579 5 2853