Survey Text

1977
1971
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1977
Survey form view entire document:  text  image
f. (Without a hearing aid) Can -- usually tell one kind of noise from another?

1 [] Y (R2)
2 [] N

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1971
Survey form view entire document:  text  image

f. (Without a hearing aid) Can -- usually tell one kind of noise from another?
[] Y (41b)
[] N