Sources of evidence to support systematic reviews in librarianship.

The article presents the results from a study regarding information sources for the interfaces MEDLINE, Library and Information Science Abstracts, and the Cochrane Methodology Register. The article discusses how important it is for researchers to have access to unpublished library conference literature in order to make informed, evidence-based, timely, and cost-effective decisions when selecting sources for systematic reviews. The article evaluates the information search results from electronic bibliographic databases and the precision of the search results.