"Hearing." . . "Audición." . . "Audiologia." . . "Deafness." . . "Sordera." . . "Infants sords." . . "Vibration." . . "Vibración." . . . . . . . . . . . "The acoustic method for the training of the deaf, and hard-of-hearing child" . . . . . . . . . . . . . "The acoustic method for the training of the deaf and hard-of-hearing child"@en . . . "The acoustic method for the training of the deaf and hard-of-hearing child" . . . . . "Niños impedidos." . . "Adquisició del llenguatge." . .