Category:Pages with ISSN errors

This category is populated by pages and templates that use ISSN.

In this template, ISSN parameters are checked for invalid ISSNs as well as extraneous text such as "ISSN", "N/A", "none", dashes (use hyphens instead), lower-case "x" (use "X" instead), and tab characters.

Error messages for erroneous ISSNs look like one of: Invalid ISSN