Fraenkel, Abraham Adolf,  1891-1965 <br/><br/>
Foundations of set theory / 
Abraham A. Fraenkel, Yehoshua Bar-Hillel and Azriel Levey 
 - 2nd ed. 
 - Amsterdam :  North-Holland,  1973 
 - x, 404 p. ;  23 cm. 
 - Studies in logic and the foundations of mathematics ;  v.67 .
<br/><br/>p. 346-390 
<br/><br/><label>ISBN: </label>0720422701 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set theory<br/>Mathematics--Philosophy