Proceedings of the 15th annual national forum, May 7, 8, 9, 1959, Washington, D. C.

Proceedings of the 15th annual national forum May 7 8 9 1959 Washington D. C.

出版社：Wash. : American Helicopter Society Inc, 1959.

出版年：1959

作者：American Helicopter Society Inc.

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Proceedings of the 16th annual national forum, May 7, 8, 9, 1959, Washington, D. C.

作者：American Helicopter Society Inc.
出版社：Wash. : American Helicopter Society Inc, 1960.
出版年：1960

Proceedings of the 20th annual national forum, May 13, 14, 15, 1964, Washington, D. C.

作者：American Helicopter Society.
出版社：[S.l. : s.n. n.d.].

Proceedings of the 17th annual national forum, May 3, 4, 5, 1961, Washington, D. C.

作者：American Helicopter Society.
出版社：Wash. : American Helicopter Society Inc, 1961.
出版年：1961

Proceedings of the 19th annual national forum, May 1, 2, 3, 1963, Washington, D. C.

作者：American Helicopter Society.
出版社：Wash. : American Helicopter Society Inc, [n.d.].

Proceedings of the 18th annual national forum, May 2, 3, 4, 1962, Washington, D. C.

作者：American Helicopter Society.
出版社：Wash. : American Helicopter Society Inc, [196?].

Proceedings of the Seventeenth Annual National Forum, May 3, 4, 5., 1961, Washington, D. C.

作者：American Helicopter Society.
出版社：New York, 1961.
出版年：1961