BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 240 million documents from more than 8,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.
Find peer-reviewed, full-text articles from journals in the areas of the physical and social sciences, technology, medicine, engineering, the arts, literature, and more. Undergraduate researchers can expand and refine search results through the Topic Finder, and citation tools are integrated directly into the user’s workflow.
(Para buscar en Espanol, seleccione "Lenguas" en la parte superior.)
Discover the most accurate, authoritative and up-to-date service and repair information for thousands of domestic and imported vehicles. All content comes from the Original Equipment Manufacturers (OEM) and includes step-by-step repair information, diagrams, maintenance schedules, parts and labor estimates, service bulletins and recalls.
This reference database provides detailed yet user-friendly repair guides for all manner of small engines. All of the content is organized in a powerful, easy-to-use manner so that users can quickly find the information they need.
Full text for hundreds of science encyclopedias, reference books, periodicals, & other sources. Topics covered include: biology, chemistry, earth & space science, environmental science, health & medicine, history of science, life science, physics, science & society, science as inquiry, scientists, technology & wildlife.
Elementary provides elementary-aged students with age-appropriate, curriculum-related content covering a broad range of educational topics such as animals, arts, geography, health, literature, people, social studies, technology, etc.