Logica elementare - Quine, Willard Van Orman, <1908-2000>. (OLS)http://semarc/name/27565; Gana, Francesco. (OLS)http://semarc/name/53968 (Ubaldini,, 1968)
Keywords: Logica - Filosofia. (OLS)http://semarc/subject/2012; Logica formale. (OLS)http://semarc/subject/393