Kryloff, N <br/><br/>
Introduction to non-linear mechanics / 
N. Kryloff and N. Bogoliuboff.  A free translation by Solomon Lefschetz of excerpts from two Russian monographs. 
 - Princeton :  Princeton university press,  1947 [Printing 1955]. 
 - 106 p. :  ill.,  23 cm. 
 - Annals of mathematics studies,  11. .
 - Annals of mathematics studies, .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.<br/>Oscillations.
<br/><br/><label>Dewey Class. No.: </label>515.35  / KRI 1955