By Townsend Barbara K.   in Journal of the American Helicopter Society

ISSN:2161-6027|32|1|33-44

AHS International‎(1987)‎

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By Townsend Barbara K.   in Community College Journal of Research and Practice

ISSN:1521-0413|27|4|273-288

Routledge Ltd‎(2003)‎

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By Townsend Barbara K.   in Community College Journal of Research and Practice

ISSN:1521-0413|24|4|301-311

Routledge Ltd‎(2000)‎

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By Townsend Barbara K.   Bragg Debra   Kinnick Mary   in Community College Journal of Research and Practice

ISSN:1521-0413|27|1|41-49

Routledge Ltd‎(2003)‎

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