Jeffreys, Harold <br/><br/>
Operational methods in mathematical physics 
Harold Jeffreys                                          
 - Cambridge  Cambridge University Press  1927 
 - vi, 99p. 
 - Cambridge tracts in mathematics and mathematical physics; v. 23 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operations Research<br/>Partial Differential Equations
<br/><br/><label>Universal Decimal Class. No.: </label>517.944  / JEF