Ryabov, Y. <br/><br/>
Celestial mechanics / 
Y. Ryabov ; translated from the Russian by G. Yankovsky 
 - Moscow :  Foreign Languages Pub. House,  1959 
 - 165p. :  ill. ;  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanics, Celestial
<br/><br/><label>Dewey Class. No.: </label>521.1