Civil aeronautics manuals: v. 2, supp. 22, Revisions to CAM 1, [Certification, identification, and marking of aircraft and related products] Nov. 1, 1956, CAM 3, [Airplane airworthiness, normal, utility, and acrobatic categories] Oct. 1956 and CAM 4b, [Airplane airworthiness, transport categories]; Jan. 1, 1958; Oct. 1, 1958.

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