000 00310nam a22001217a 4500
999 _c3540
_d3540
020 _a0867151099
082 _a617.632
_bW42
245 _aWhat is periodontal disease?
260 _aChicago, Illinois
_bQuintessence Publishing Co
_cc1984
300 _a68 p.
_bcol ill
650 _aPeriodontal Diseases
942 _cBK