00317nam a22001337a 4500003000400000020001800004082001800022100003100040245002800071250000800099260004900107300000800156650001900164SGT  a9788186809426  a617.645bC09V  a B.R.R. Varma,  R.P. Nayak  aCLINICAL PERIODONTOLOGY  a3RD  aNEW DELHIb Arya MEDI Publishing Housec2017  a284  aPERIODONTOLOGY