Sikorski, Roman. <br/><br/>
Boolean Algebras /  

 - Third Ed. /  
 - Berlin :   Springer-Verlag ,   1968 
 - p.237,x :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>B281:g  / K9