Leech, J. (1970). Computational problems in abstract algebra. Pergamon Press Ltd.
Lua i Stíl Chicago (17ú heag.)Leech, John. Computational Problems in Abstract Algebra. Oxford: Pergamon Press Ltd, 1970.
Lua MLA (9ú heag.)Leech, John. Computational Problems in Abstract Algebra. Pergamon Press Ltd, 1970.
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