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BASE (Bielefeld Academic Search Engine) is one of the world's most voluminous search sengines especially for academic web resources, e.g. journal articles, preprints, digital collections, images / videos or research data. Other than search engines like Google or Bing BASE searches the deep web as well. The sources which are included are intellectually selected and reviewed. BASE is operated by Bielefeld University Library.
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CiteSeerx is a scientific literature digital library and search engine that focuses primarily on the literature in computer and information science. CiteSeerx aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge.
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The Country Analysis Briefs are reports on the energy situation in the countries and regions of the world. In addition to a general up-to-date overview, they contain information on the country's raw material deposits (crude oil, coal, natural gas), electricity supply and a summary of the most important economic data. Data by country, region and trade group (OECD, OPEC) for 217 countries including total and crude oil production, oil consumption, natural gas production and consumption, coal production and consumption, electricity production and consumption, primary energy, energy intensity, CO2 emissions, and imports and exports for all fuels.
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The DART-Europe E-theses Portal is a searchable database of electronic research theses held in European repositories. The theses listed are open access - publicly available, in full, without charge. The DART-Europe Portal does not store theses, but it provides a link to at least one electronic copy of every thesis listed in its database.
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EThOS is the UK’s national thesis service. There are approximately 480,000 records relating to theses awarded by over 120 institutions. Around 260,000 of these also provide access to the full text thesis, either via download from the EThOS database or via links to the institution’s own repository. Of the remaining 220,000 records dating back to at least 1800, three quarters are available to be ordered for scanning through the EThOS digitisation-on-demand facility.
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