Theses (Masters, BSc) and dissertations (PhD) are essential sources of information. Different search engines and databases provide both unique and overlapping coverage of these types of documents. SciFinder provides coverage of dissertations (not MSc theses) since 1942. Dissertation information in SciFinder is added from three sources: ProQuest Dissertations and Theses, German Dissertation Abstracts and China Integrated Knowledge Resource Database. Coverage focuses on chemistry and related sciences from more than 40 countries, including USA, Canada, and China. ProQuest Dissertations and Theses provides coverage of both dissertations and theses from North American, increasingly world-wide and English-speaking institutions since 1861.