Smirnov, M. M. <br/><br/>
Second-order partial differential equations 

 - Groningen :  Noordhoff,  1966 
 - 192 p. 
<br/><br/><label>LCCN: </label>57868 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecuaciones diferenciales.
<br/><br/><label>Dewey Class. No.: </label>517.38  / S5