Use for works covering the period until 21 Feb. 1958 and from 28 Sept. 1961 to 12 Sept. 1971. 'Egypt' and 'Syria' united to form the 'United Arab Republic' from 22 Feb. 1958 until 27 Sept. 1961. 'Syria' changed its name to 'Syrian Arab Republic' on 13 Sept. 1971.
