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- [32] GROUPS WITH EVERY SUBGROUP 2-SUBNORMAL JOURNAL OF THE LONDON MATHEMATICAL SOCIETY-SECOND SERIES, 1973, 7 (AUG): : 17 - 18
- [34] THEOREMS ON COUNTING SUBGROUPS OF FINITE P-GROUPS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 20 (03): : A383 - A383