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Formal logic.
by:
Petäjä, Jukka
In: Books from Finland. - ISSN 0006-7490. - Helsinki : Helsinki University Library. - 29 (1995) : 4, s. 266-268
Journal article
In: Books from Finland. - ISSN 0006-7490. - Helsinki : Helsinki University Library. - 29 (1995) : 4, s. 266-268
Journal article