Hellwig, Gunter <br/><br/>
Differential operators of mathematical physics : An introduction / 
Günter Hellwig ; tr. Birgitta Hellwig. 
 - 1a ed. 
 - Reading Massachusets :  Addison-wesley,   1967 
 - vii, 296 p. :  23 cm. 
 - (Addison - wesley series in mathematics) .
<br/><br/>Incluye apéndice, bibliografía e índice 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Física matemática 
<br/><br/><label>LC Class. No.: </label>QA432  / H45 1967