This publication has been a rich source of historical knowledge on developments, trends and achievements of multilateral disarmament for more than 30 years. In early spring of each year, Part I of the Yearbook is published containing an annual compilation of texts and statistics on disarmament-related resolutions and decisions of the General Assembly. In early Autumn, Part II is published presenting the main topics of multilateral consideration during the year, along with a convenient issues-oriented timeline.