List of United Nations document series symbols / Dag Hammarskjold Library 015 UNL Holdings in 3x5 and visible files. Main series: United Nations. [Document]. Vols. for 1955- issued as its Bibliographical series, no. 5. Vols. for 1955- issued with the United Nations publications sales numbers. Vols. for 1952-55 issued by the library under its earlier name: United Nations Library. Addenda accompany some issues. Title varies. New York : United Nations, 1965. 1965. Text Collection 139 p. ; und SERLOC succeeding entry: United Nations. Dag Hammarskjöld Library. United Nations document series symbols