Dissertation abstracts  [computer file] 
 Proquest dissertation abstracts  [electronic resource] 

 - USA :  ProQuest LLC,  2000- 
 - computer optical discs ;  4.75 in. 
 = Dissertation abstracts Dissertation abstracts 
<br/><br/><label>Source: </label> ProQuest, Petaling Jaya, Selangor  USD 7,745.00 (Langganan tahunan)