Academic Search Complete is a comprehensive scholarly, multi-disciplinary full-text database, with more than 8,500 full-text periodicals, including more than 7,300 peer-reviewed journals. In addition to full text, this database offers indexing and abstracts for more than 12,500 journals and a total of more than 13,200 publications including monographs, reports, conference proceedings, etc. The database features PDF content going back as far as 1887, with the majority of full text titles in native (searchable) PDF format. Searchable cited references are provided for more than 1,400 journals.
This database contains bibliographic records from the U.S. Department of Agriculture's National Agricultural Library. Coverage for AGRICOLA dates back to 1970 and includes more than 4.8 million citations.
The Directory of Open Access Journals covers free, full text, quality controlled scientific and scholarly journals. Covers numerous subjects and languages. There are over 3600 journals in the directory.
More than 24 million citations for biomedical literature from MEDLINE, life science journals, and online books; citations may include links to full-text content from PubMed Central and publisher web sites. Provided by The National Center for Biotechnology Information (NBI), US NAtional Library of Medicine, and National Institute of Health (NIH), USA