Petrovsky [i G],  <br/><br/>
Lectures On Practical Differential Equations Tr From Russian By A S 

 - Kottayam  NATIONAL BOOKSTALL  1962 
<br/><br/><label>Subjects--Uniform Titles: </label>--General Stack
<br/><br/><label>Subjects--Topical Terms: </label><br/>DIFFERENTIAL EQUATIONS--Generalia--MATHEMATICS
<br/><br/><label>Dewey Class. No.: </label>515.35  / PET-L