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Journal Coverage

Article counts and citation data for Essential Science Indicators are derived from 11,855 journals indexed in Web of Science Core Collection (Science Citation Index Expanded and Social Sciences Citation Index only) over a 10-year period.

Each journal is assigned to one of 22 research fields. In ESI, a journal can be assigned to only one field.  Journals such as Science and Nature are categorized as multidisciplinary since they publish research in many different fields. As a result, papers published in these multidisciplinary journals are assigned to a field based on the representation of cited journals. For example, if the majority of citations to a paper published in Science come from neuroscience journals and the majority of cited references in the paper are to neuroscience journals, the paper is then categorized as neuroscience. 

Journal List

The master journal list (application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 761.9 kB, info) comprises all journals covered for Essential Science Indicators as of January 8, 2015, to cover a 10-year plus 10-month period, January 1, 2004-October 31, 2014. This is the fifth bimonthly period of 2014. Journals are listed alphabetically within each of the 22 fields covered by the database. Where available, journal ISSNs have been supplied.

This master journal list will be updated regularly. The current extraction date is December 1, 2014.