TY - BOOK T1 - Necessary truth T2 - Philosophy of science ; A1 - Quine, Willard Van Orman LA - English PP - Washington PB - U.S. Information Agency YR - 1960 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dhu.koha29347 OP - 7 KW - Lógica ER -