71. Civil aeronautics manuals: v. 2, supp. 2, Revisions to [Manual 8, Aircraft airworthiness, restricted category, 2d edition, Sept. 1956]: Dec. 31, 1956. Bookmark Corporate/Agency Authors: Civil Aeronautics Administration and Commerce Dept. Publisher: Civil Aeronautics Administration Date: [1950.] SuDoc number: C 31.107/2:2/supp.2