EWGPO/ESPO [European Working Group of Pediatric Otorhinolaryngology/European Society of Pediatric Otorhinolaryngology] - 6th international congress of pediatric otorhinolaryngology
EWGPO/ESPO [European Working Group of Pediatric Otorhinolaryngology/European Society of Pediatric Otorhinolaryngology] - 6th international congress of pediatric otorhinolaryngology : Rotterdam, May 1994