By Putnam Jacob B.   Somers Jeffrey T.   Untaroiu Costin D.   in Traffic Injury Prevention

ISSN:1538-9588|15|8|844-854

Taylor & Francis Ltd‎(2014)‎

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By Putnam Jacob B.   Untaroiu Costin D.   Littell Justin   Annett Martin   in Journal of the American Helicopter Society

ISSN:2161-6027|60|2|1-10

AHS International‎(2015)‎

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