1. Quality of Journals – JCR Journal Citation Reports
Livia Vasas
2013 September

3. JCR Journal Citation Reports

4. About this database

5. Impact Factor - ISSN
IF: Average number of times articles from the journal published in the past two years have been cited in the JCR year.
ISSN:International Standard Serial Number, a unique number that identifies a journal. The format is four numbers, a hyphen (-), three numbers, and then a check character that may be a number or X. For example,

9. IF value - calculation

10. Questions
What was the IF value of the journal Nature Genetics in 2007 ?
25,556
What was the IF value of the journal PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA  in 2008 ?
9,380

11. Questions
What was the IF value of the journal JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION in 2009 ?
28,899
How many different journal titles are in 2008 In the subject „Gerontology”? 25

12. Questions
How many journal titles are in the 2009 JCR Social Science Edition ?
2257
And in the JCR Social Science Edition
2731

13. Thank you for your attention