Young, Robert Gordon. <br/><br/>
Conjuntos 
Robert Gordon Young. 
 - Madrid  Ediciones del Castillo  1970. 
 - 96 p.  diagrs.  21 cm. 
 - Serie Didáctica programada .
<br/><br/> Translation of : Sets. 
<br/><br/><label>LCCN: </label>evn00001471  
<br/><br/><label>Nat. Bib. No.: </label>B66-10941 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set theory.--Programmed instruction.
<br/><br/><label>LC Class. No.: </label>QA248  / .Y75 
<br/><br/><label>Dewey Class. No.: </label>512/.817