Birkhoff, Garrett <br/><br/>
Elliptic problem solvers II 
Garrett  Birkhoff                                           
 - Orlando  Academic Press  1984 
 - xiii, 573p. 
<br/><br/><label>ISBN: </label>0-12-100560-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential Equations<br/>NASA Thesaurus
<br/><br/><label>Universal Decimal Class. No.: </label>517.91  / BIR