Conclusive:
The Yearbook is the principal reference work on the United Nations and provides a detailed overview of the Organization's concerns and activities.
Comprehensive:
Each Yearbook is fully indexed and includes all major General Assembly, Security Council and Economic and Social Council resolutions.
Complete:
The complete collection (1946-2006) is available here.
Selected a 2008 Best Notable Government Document:
"a major step toward providing universal access to UN information".