000 00362cam a22001451 4500
020 _a072165620
050 0 0 _aMED RK510
_bL3
100 1 _aLanga, Harry.
245 1 0 _aRelative analgesia in dental practice;
260 _aPhiladelphia,
_bSaunders,
_c1968.
300 _a283 p.
_bill.
650 0 _aNitrous oxide.
650 0 _aAnesthesia in dentistry.
942 _cBK
999 _c3272
_d3272