Copied from English Wikipedia (en:Image:Efron dice.png). Uploaded there by the author, , who has released the image to public domain on the basis that the "concept believed to be common knowledge and ineligible for copyright."
Image history in English Wikipedia:
(del) (cur) 04:23, 27 April 2006 . . Booyabazooka (Talk) . . 322x73 (4705 bytes) (Still can't get this file to download. Trying a 24-bit version just for kicks...)
(del) (rev) 07:42, 26 April 2006 . . Booyabazooka (Talk) . . 322x73 (3274 bytes) (Not sure why this isn't working. Re-upload...)
(del) (rev) 06:48, 26 April 2006 . . Booyabazooka (Talk) . . 322x73 (3274 bytes) (Corrected the last die)
(del) (rev) 00:20, 26 April 2006 . . Booyabazooka (Talk) . . 322x73 (3220 bytes) (Image created entirely by me; concept believed to be common knowledge and ineligible for copyright.)
{{en|Efron's dice}} {{fi|Efronin nopat}} Copied from English Wikipedia (en:Image:Efron dice.png). Uploaded there by the author, en:User:Booyabazooka, who has released the image to public domain on the basis that the "concept believed to be comm