The Cochrane Library consists of multiple individual resources
As well as:
Cochrane Controlled Trials Register (CENTRAL) is a bibliography of controlled trials (primary research) identified by contributors to the Cochrane Collaboration and others, as part of an international effort to create an unbiased source of data for systematic reviews. This database does not contain full text articles.
The Cochrane Methodology Register (CMR) is a bibliography of publications which report on methods used in the conduct of controlled trials. It includes journal articles, books and conference proceedings; these articles are taken from the MEDLINE database and from hand searches.