Gordon Carl E. <br/><br/>
Elementary set theory :  proof techniques / 
Carl E. Gordon, Neil Hindman. 
 - New York ;  London ;  Hafner Press,  1975. 
 - XI, 305 s. ;  24 cm. 
<br/><br/><label>ISBN: </label>0028453501 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teoria mnogości<br/>Rachunek zdań.
<br/><br/><label>Universal Decimal Class. No.: </label>51