William Arthur Doan, b 18 Jan 1884; d 2 Jul 1971 Potter Co, TX; last residence Tulia, Swisher Co, TX; SS card issued in TX.
Ruth Evelyn Doan, b 6 Oct 1896; d 26 Dec 1986 Swisher Co, TX; last residence Tulia, Swisher Co, TX; SS card issued in TX.
With exact date of death you can now look for an obituary.
Go to the Swisher Co, TX GenWeb site, type Doan in the search feature and several items will come up.Mostly showing Doans buried in Rose Hill Cemetery including:
Ruth Mills Doan 1896-1986 William Arthur Doan 1884-1971 W.A. Doan Jr. 1921-1983 J. Hatcher Doan 1888-1955 [is he a bro to Wm Arthur?]
There is a countyhistory book and it contains surname of Doan.There is a link you can click on and ask for details in the book.
Using an online directory http://www.four11.comhttp://www.four11.com and type in surame of Doan, town of Tulia, state of TX and up comes listing for Jim and Parker Doan.You can contact them, maybe they can help with your research.Especially since they are still in the same town.