This multi-volume reference work contains material on over 44,500 treaties executed by 350 countries and international organizations from 1900 to 1980. The work provides chronological listings by date of formal signing of treaties as well as a party index and keyword index.

This book offers a comprehensive analysis of the law of treaties based on the interplay between the 1969 Vienna Convention on the Law of Treaties and customary international law. Written by a team of renowned international lawyers, it offers new insight into the basic concepts and methodology of the law of treaties and its problems.