TY  - BOOK
AU  - Darby, Michele L..
AU  - Walsh,.,
TI  - Dental Hygiene Theory and Practice / 
U1  - 617.632 
PY  - 2003///
CY  - Philadelphia : 
PB  - Saunders An Imprint of Elsevier , 
KW  - Periodontology
ER  -