TY  - BOOK
AU  -  Williams,David M.
TI  -  Pathology of periodontal diseases / 
SN  -  0192619551
PY  - 1992///
CY  -  Oxford : 
PB  -  University Press, 
KW  -  Periodontal Diseases
KW  -  diagnosis
N1  -  Includes bibliographical references and index
ER  -