By Simpson Kenneth   Beukelman David   Bird Ann   in Augmentative & Alternative Communication

ISSN:0743-4618|14|4|212-221

Informa Healthcare‎(1998)‎

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By Simpson Kenneth   Beukelman David   Sharpe Tom   in Augmentative & Alternative Communication

ISSN:0743-4618|16|2|107-121

Informa Healthcare‎(2000)‎

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Safety Critical Systems Handbook‎

By Smith   David J.;Simpson   Kenneth G. L.  

ISBN:9780080967820

Elsevier Science‎(2010)‎

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The Safety Critical Systems Handbook‎

By Smith   David J.;Simpson   Kenneth G. L.  

ISBN:9780081008973

Elsevier Science‎(2016)‎

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By Simpson Kenneth   Cumley Gary   Novak Betsy   Tegtmeier Jennifer   Beukelman David   in Augmentative & Alternative Communication

ISSN:0743-4618|13|2|81-86

Informa Healthcare‎(1997)‎

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By Simpson Kenneth   Hux Karen   Beukelman David   Lutt Suzanne   Gaebler Carol   in Augmentative & Alternative Communication

ISSN:0743-4618|12|3|181-188

Informa Healthcare‎(1996)‎

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