Subject specific databases often cover that area's literature in more depth than a multidisciplinary database.
These multidisciplinary databases cover a wide range of fields. Web of Science concentrates on the core journals in the fields, while Scopus covers a wider range of titles.. Scifinder is focused on the chemistry literature, and PubMed covers ...
Primary sources represent original research from the discovery stage to official publications:
Secondary sources organize, repackage and concentrate the published information from primary sources into:
Secondary sources are where you go to find general overviews of research occurring in the field or interpretations of past research.
Is a review article considered a primary source?
No, because the authors are not reporting their own original research, but rather, they are discussing other authors' research in order to present a review of the subject area or topic.
How can I tell if a journal is peer-reviewed?
NOTE: Not all items published in a peer-reviewed journal are necessarily peer-reviewed, for example editorials or letters.