TY  - BOOK
AU  - Langa, Harry.
TI  - Relative analgesia in dental practice: inhalation analgesia and sedation with nitrous oxide 
SN  - 721656218
AV  - RK 512.N55 .L36 1976 
PY  - 1976///
CY  - [Place of publication not identifed]
PB  - [publisher not identified]
N1  - Relative analgesia in dental practice : inhalation analgesia and sedation with nitrous oxide, Relative
ER  -