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DOAJ -- Directory of Open Access Journals
Описание: Categorized, searchable links to free, full text, quality controlled scientific and scholarly journals.
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DeepDyve is the largest online rental service for scientific, technical and medical research.
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Scirus is the most comprehensive science-specific search engine on the Internet. Driven by the latest search engine technology, Scirus searches millions ...
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Tables of contents and abstracts of articles from journals in agricultural sciences, science and technology, health and social sciences, published in Africa.
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PNAS. Beginning January 2002, PNAS research articles and papers published online before print in PNAS Early Edition are available only to paid subscribers for six ...
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PLOS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines ...
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Detail analysis user agent string (alias UA string)
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Advocates the free distribution of science and medical published articles.
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Web search engine designed for children ages 6 to 12. Powered by Ask.com.
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