Gaal, Steven A. <br/><br/>
Point set topology, 
by Stephen A. Gaal. 
 - New York,  Academic Press,  1964. 
 - xi, 317 p. 
 - Pure and applied mathematics; a series of monographs and textbooks,  16 .
<br/><br/><label>Subjects--Index Terms: </label>Set topology, 
<br/><br/><label>Universal Decimal Class. No.: </label>515.122:2  / GAA