Titchmarsh, E. C.  1899- <br/><br/>
Eigenfunction expansions associated with second-order differential equations,  Part. I/ 
by E.C. Titchmarsh. 
 - 2nd ed. 
 - Oxford:  Clarendon Press,  [c1962]. 
 - 203 p.:  23 cm. 
<br/><br/><label>Dewey Class. No.: </label>515.35  / T617e