Garry,
We need to know more specific interests your father may have which may fall into one the following categories:
1) specific Texas county or counties
2) personnel who he studies
3) military units that he studies
Personally, I study the Texas State Troops of 34 counties of North Texas during the Civil War.
Please look at my web site, www.bourlandcivilwar.com, that describes my 998-page book, "Bourland in North Texas & Indian Territory During the Civil War: Fort Cobb, Fort Arbuckle & the Wichita Mountains."
prochette@Juno.com
Patricia Adkins-Rochette, 918-250-5040
7312 South Garnett Road, #318, Broken Arrow, OK 74012