found: Tokushima-ken no kyōikushi, 1983:t.p. (in title: Tokushima-ken)
found: Zenkoku shichōson, 1978:p. 348 (Tokushima-ken)
found: Nihon zenkoku bunken chizu, 1983(Tokushima-ken)
found: LC database, Mar. 15, 2005(hdg.: Tokushima, Japan (Prefecture); usage: Tokushima-ken, Tokushima Prefecture)
found: GEOnet, Mar. 15, 2005(Tokushima [short form]-ken--ADM1, 34°15ʹN 134°00ʹE; JA39; PPLA Tokushima also listed)
found: ClassWeb, July 10, 2020(Tokushima; covers the former Awa province; DS894.89.T63-.T6395)