Sobolev, Leonid Sergeevich,  1889- <br/><br/>
The big refit / 
Leonid S. Sobolev ; Translated from the Russian b y Bernard Isaacs. 
 - Moscow :  Progress Publishers,  1965. 
 - 2 pts. in 1 V. ;  21 cm. 
<br/><br/><label>Dewey Class. No.: </label>891.734