Category:Pages with ISBN errors

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This category is populated by pages and templates that use {{ISBN}} and {{ISBNT}}. In these templates, ISBN parameters are checked for invalid ISBNs as well as extraneous text such as "ISBN", "N/A", "none", dashes (use hyphens instead), lower-case "x" (use "X" instead), and tab characters.

Error messages for erroneous ISBNs look like one of:

  • Check |isbn= value
  • Invalid ISBN
  • Parameter error in {{isbn}}: Invalid ISBN