CIAO (Columbia International Affairs Online) is a comprehensive source for research in international affairs. It includes full text of selected books on international affairs, working papers from university research institutes, occasional papers series from NGOs, foundation-funded research projects, and proceedings from conferences. It also, contains abstracts and some full text of selected journal articles
Think Tank Search is a custom Google search of more than 1200 think tanks and research centers. For the purposes of this search, think tanks are defined as institutions affiliated with universities, governments, advocacy groups, foundations, and non-governmental organizations.