Sciencedirect is the world's leading source for scientific, technical, and medical research. explore journals, books and articles.
Providing researchers with access to millions of scientific documents from journals, books, series, protocols, reference works and proceedings.
Apollo scientific | supplying research intermediates for over 20 years
The leading source for trustworthy and timely health and medical news and information. providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert commentary, and medical review.
One of the largest and most authoritative collections of online journals, books, and research resources, covering life, health, social, and physical sciences.
Alfa aesar is a leading manufacturer and supplier of research chemicals, pure metals and materials for a wide span of applications.
Use pubmed to search 17 million citations from medline and other life science journals for biomedical articles back to the 1800s.
Pipl is the world's leading provider of identity information services for professional investigation and identity verification applications. free trial available.
Free, legal research articles delivered instantly or automatically requested from authors.
Library genesis is a scientific community targeting collection of books on natural science disciplines and engineering.