540,825 SURJÁN L. [red .] Borderline problems in otorhinolaryngology. Proceedings of the Xll th World Congress or Otorhinolaryngology. Budapest, Hungary 21—27 June 1981. Ed. by L. Surjan, Gy. Bodo Amsterdam 1982 Excerpta Medica 8° s. XXVII, nlb. 1, 723, il. Excerpta Medica International Congress Ser. 582