Marks, Robert W. <br/><br/>
Simplifying set theory;  a programmed text / 
Robert W. Marks. 
 - New York :  Bantam Books,  [1966] 
 - 127 p.  illus.  18 cm. 
 - A unifact book. SU4 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set (Psychology)
<br/><br/><label>LC Class. No.: </label>BF 175  / M346s 1966