TY  - BOOK
AU  - Gherig, Jill S. Nield.
TI  - Fundamentals of Periodontal Instrumentation & Advanced Root Instrumentation 
SN  - 9780781769921
PY  - 2017///
CY  - Philadelphia
PB  - Wolters Kluwer
UR  - https://books.google.com.pk/books?id=C8HJtwEACAAJ&dq=Fundamentals+of+periodontal+instrumentation+:+%26+advanced+root+instrumentation&hl=en&sa=X&redir_esc=y
ER  -