00348nas a2200121   4500000000100000008004100001100001100042245003200053856011200085300000800197490000700205022001400212       2015                            d1 aRao RG00aProf. Dr. B. Narasimha Rao.  uhttp://www.ijdvl.com/article.asp?issn=0378-6323;year=2015;volume=81;issue=2;spage=231;epage=231;aulast=Rama  a2310 v81  a0973-3922