Some practical vocational aids for the blind

Brabyn, J., Gerrey, W., Fowle, T., Alden, A., & Williams, J.. (1989). Some practical vocational aids for the blind. In Conference: Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in Conference (Vol. 5, pp. 1502 - 1503). http://doi.org/10.1109/IEMBS.1989.96310