By Aldawody D. A.   Elbashbeshy E. M.A.   in Canadian Journal of Physics

ISSN:1208-6045|89|3|295-298

NRC Research Press‎(2011)‎

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By Elbashbeshy E M.   Bazid M AA   in Canadian Journal of Physics

ISSN:1208-6045|81|4|699-703

NRC Research Press‎(2003)‎

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