00250pam a2200097a 44500008004100000041000800041100002500049245003000074260004000104300000800144230405s2008    xxu||||| |||| 00| 0 eng d  aENG  aDubey and Maheshwari  aA Textbook of Microbilogy  aram nagarbs chand and co ltdc2008  a912