Petrovsky, I.G <br/><br/>
Lectures on partial differential equations 
I.G. Petrovsky 
 - New York  Dover Publications  1991 
 - x  245 
<br/><br/><label>ISBN: </label>9780486669021 
<br/><br/><label>Dewey Class. No.: </label>10.02  / PETR