By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|12|4|61-77

AHS International‎(1967)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|9|1|38-42

AHS International‎(1964)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|10|2|29-30

AHS International‎(1965)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|9|2|32-37

AHS International‎(1964)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|15|1|54-58

AHS International‎(1970)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|5|2|31-35

AHS International‎(1960)‎

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By Sissingh G. J.   in Journal of the American Helicopter Society

ISSN:2161-6027|13|3|56-63

AHS International‎(1968)‎

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By Sissingh G. J.   Kuczynski W. A.   in Journal of the American Helicopter Society

ISSN:2161-6027|15|2|2-9

AHS International‎(1970)‎

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