Cohen, Leon Warren  (1903-1992). <br/><br/>
The structure of the real number system / 
Leon W. Cohen, Gertrude Ehrlich. 
 - Priceton :  D. Van Nostrand Co., Inc.,  1963. 
 - VIII, 116 s. ;  23 cm. 
 - University Series in Undergraduate Mathematics .
 - University Series in Undergraduate Mathematics .
<br/><br/>Bibliogr. s. 113-114.