157.  Conzola, C. V., & Wogalter, M. S. (1999). Using voice and print directives and warnings to supplement product manual instructions. International Journal of Industrial Ergonomics, 23, 549-556.

157.  Conzola, C. V., & Wogalter, M. S. (1999). Using voice and print directives and warnings to supplement product manual instructions. International Journal of Industrial Ergonomics, 23, 549-556.

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