This document discusses finding authoritative texts of treaties and international agreements from reliable sources. It recommends using the League of Nations Treaty Series (LNTS) and United Nations Treaty Series (UNTS) as the primary sources, as well as the International Legal Materials (ILM) for more recent treaties. It provides information on accessing the full texts of these sources through libraries like HeinOnline or websites like the United Nations Treaty Collection database. Government and international organization websites can also contain freely available treaty texts.