000 00300nam a2200121Ia 4500
008 160921s9999 xx 000 0 und d
020 _a1-85097-053-x
100 _aChapple,Angela
245 _aUnderstanding Periodontol Diseases
260 _bQuintessence Pub.
_c2002
300 _a160
942 _cBK
999 _c26311
_d26311