It is disputed whether the copyright tag on this file is correct. In some cases this may be because the stated source or other information is not sufficient to prove the selected tag is correct. Reason: Historical, most likely out of copyright, but not uploader's own work, nor GFDL-able by them
With the tool CheckUsage you can check the usage of this file in other Wikimedia projects
Do not use this tag for files sourced to third-parties with no evidence of permission to license it under a compatible license, use {{subst:Npd}} for these situations.