Civil aeronautics manuals: v. 2, supp. 18, Revisions to CAM 3 [Airplane airworthiness, normal, utility, and acrobatic categories], Oct. 1956, CAM 6 [Rotorcraft airworthiness, normal category, 2d edition], Nov. 1956, CAM 8 [Aircraft airworthiness, restricted category], Sept. 1956, and CAM 10 [Certification and approval of import aircraft and related products], Nov. 1956; Mar. 10, 1958.

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