Perron, Oskar   1880- <br/><br/>
Irrationalzahlen / 
Von Dr. Oskar Perron. 
 - New york :  Chelsea co.,  1960. 
 - 199 p. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrational numbers.
<br/><br/><label>Dewey Class. No.: </label>512.81  / PEI 1960