Halmos, Paul R. ( Paul Richard )  ,1916- <br/><br/>
Naive set theory. 

 -  Van Nostrand Princeton, N.J.  1960  [1960] 
 - 104 p.24 cm. 
 - The University series in undergraduate mathematics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set theory.<br/>Arithmetic -- Foundations.--QA
<br/><br/><label>LC Class. No.: </label>QA248.H26