TY  - BOOK
AU  - O'Brien,Richard C.
TI  - Dental radiography :an introduction for dental hygienists and assistants
SN  - 0721668925
AV  - MEDRK309 O2 7
PY  - 1977///
CY  - Philadelphia 
PB  - Saunders
KW  - Teeth
KW  - Radiography, Dental
ER  -