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Journal of Visual Impairment & Blindness

Impact Factor: 1.1 / 5-Year Impact Factor: 1.5

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First published online 1982-5

A ‘Polaroid’ Ultrasonic Travel Aid for the Blind?

Volume 76, Issue 5

https://doi.org/10.1177/0145482X8207600511

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References

1.

Crawley

G.

Automatic focusing by echo.

The British Journal of Photography, 13th. April 1979 pp. 340–344.

2.

Mimms

F. M.

Advances in active radiating mobility aids. In Devices and systems for the disabled. Kwatny

E.

, (Ed.), Philadelphia: Krusen Centre for Research, 1975.

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