Kristova, Bistra K. <br/><br/>
Magnetic disc drive EC 5052 / 
Bistra K. Hristova. 
 - [s.l.] :  Sofia,  1976. 
 - 107 p. ; 
<br/><br/> Title on cover : system/ES magnetic disc drive ES 5052. 
<br/><br/><label>ISBN: </label>SC1458 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Floppy disks.
<br/><br/><label>Dewey Class. No.: </label>004.563 K898 Ma