An in-depth guide to researching international treaties. Includes links to U.S., multilateral, bilateral and subject collections as well as citation help.The major requires the completion of at least 12 courses. International law is derived primarily from two sources: international agreements and customary international practice. Winkler, 2014: International Cooperation: Agreements and Instruments. In: Climate Change 2014: Mitigation of Climate Change. The United Nations Framework Convention on Climate Change (UNFCCC) is the UN process for negotiating an agreement to limit dangerous climate change. International agreements are formal commitments between countries, categorized as bilateral or multilateral. This publication lists treaties and other international agreements of the United States on record in the. The Convention in the examination for the issue of a certificate complying with the Radio.