Dissertations and theses are great sources of information for more obscure or niche research topics. They also provide useful models to follow for students doing graduate-level work.
Collection of multi-disciplinary dissertations and theses from around the world. Full text available for most dissertations added since 1997. Selective coverage of Tulane University scholarship begins in 1957.
BASE (Bielefeld Academic Search Engine), a German database, is one of the world's most voluminous search engines for academic resources like journal articles, dissertations and theses, and research reports. It is especially strong in international and open access content.