chemBlink官网
chemBlink provides a free database of chemicals from around the World, searchable for product identifications, CAS numbers, SDS, formulas, suppliers and more. Contact us today.
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Find Articles官网
Find Articles论文搜索网提供多种顶极刊物的上百万篇论文，涵盖艺术与娱乐、汽车、商业与经融、计算机与技术、健康与健身、新闻与社会、科学教育、体育等各个方面的内容。
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Book Gold Mine
Book Gold Mine可免费提供大量优质的电子书，演讲稿，笔记和其他类型的文档。提供的类别有很多，比如生物学、商业、计算机科学、数学和物理学等，如果您需要以上类似的PDF文档，这是一个很有用的PDF搜索引擎。Free e-books, lectures, notes and other documents in various subjects
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SCIRP Open Access
Scientific Research Publishing is an academic publisher with more than 200 open access journal in the areas of science, technology and medicine. It also publishes academic books and conference proceedings.
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Thèses官网
Moteur de recherche des thèses françaises, theses.fr propose l’accès aux thèses de doctorat soutenues ou en préparation. Grâce à son moteur de recherche et sa navigation par facette, l’interface donne accès aux données des thèses : titre, docteur, disciplines, directeurs, établissements de soutenance, écoles doctorales, partenaires de recherche, date de soutenance et éventuellement au texte intégral.
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DART-Europe官网
Portal for open access research theses. DART-Europe is a partnership of research libraries and library consortia who are working together to improve global access to European research theses. The DART-Europe partners help to provide researchers with a single European Portal for the discovery of Electronic Theses and Dissertations (ETDs).
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Library Genesis - Library Genesis Guide
Library Genesis 图书馆创世纪 - 中文 (中国). 从Library Genesis和lib gen下载免费的电子书 。Library Genesis and libgen website and proxies guide. Working links and mirrors for downloading ebooks and textbooks from lib gen, gen lib rus eс, libgen.io
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