Oberschelp Arnold <br/><br/>
Set theory over classes 

 - Warszawa  Panstwowe Wydawnictwo Naukowe       1973 
 - 66p.  cm. 
 - Dissertationses mathematicqe; 106 .
<br/><br/><label>Standard No.: </label>79906 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B217, L32