TY  - BOOK
AU  - Gehrig,
TI  - Fundamentals of Periodontal Instrumentation and advance Instrumentions 6th
SN  - 978-0-7817-6992-1
U1  - 617.632 
PY  - 2008///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins
KW  - Periodontology
ER  -