Haack, Wolfgang <br/><br/>
Lectures on partial and Pfaffian differential equations 

 - Oxford:   Pergamon Press,   1972 
 - xv, 548p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial	
<br/><br/><label>Subjects--Index Terms: </label>Pfaffian problem 
<br/><br/><label>Universal Decimal Class. No.: </label>517.944  / L2