Logica / 
National council of teachers of mathematics ; tr. Federico Velasco coba 
 - 64 páginas 
<br/><br/> Traduccion de: topics in mathematics for elementary school teachers : booklet numer 12. logic 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aritmética--Fundamentos<br/>Lógica simbólica y matemática
<br/><br/><label>LC Class. No.: </label>QA248.3  / L6418