Formal logic

Mourant, John A. 1903-. Formal logic: an introductory textbook / John A. Mourant . - New York : Macmillan company, London : Collier-Macmillan Limited, 1963 . - xvi, 421 p. tab. 22 cm. - (Christian wisdom series )
К.: Бібліогр. : c. 409-411, Index