Naimark, M.A. <br/><br/>
Linear differential operators 

 - London  George G. Harrap  1968 
 - 2 v. (v.2-xv, 352 p.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linear differential operators
<br/><br/><label>Dewey Class. No.: </label>515.7242  / NAI