Jeffreys, Harold <br/><br/>
Operational methods  : in mathematical physics 

 - 2nd ed. 
 - London  ; Stechert-Hafner Service  , 1964 
 - vi,117p. 
<br/><br/><label>ISBN: </label> 24 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Operational Methods
<br/><br/><label>Dewey Class. No.: </label>519  / JEF