Yassin, S.Kh., B. H. Khdhir, B. H. Hussein, & G. A. Abd.
" Improvement the Action Efficiency  of Microwave  Vacuum Tube Type GI-19B by Activation  its Intersurfaces." <em>Ibn AL- Haitham Journal For Pure and Applied Science</em> [Online], 21.2 (2008): 36-44. Web. 22 Nov. 2019