00788cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035001900092040002500111042001200136050002000148082001300168110007900181245004300260260004200303300003100345410007800376504002900454650001800483650001600501999001700517med48000923 DLC20260227111610.0790827s1947    enka     b   f000 0 eng    amed48000923   a(OCoLC)5316094  aDLCcOCldOCoLCdDLC  apremarc00aRF300b.M4 1947  a617.80782 aMedical Research Council (Great Britain).bCommittee on Electro-acoustics.00aHearing aids and audiometers;breport.  aLondon,bH.M. Stationery Off.,c1947.  aiv, 71 p.bdiagrs.c25 cm.20aMedical Research Council (Great Britain)tSpecial report series,vno. 261  aIncludes bibliographies. 0aHearing aids. 0aAudiometry.  c38951d38951