Well, Seed, Bob told me he'd written it. In my mind there's no questioning that he wrote it. I have seen it also credited to John D. Loudermilk (Nashville writer) as well as to Bob. Some even seem to enjoy thinking that it's a traditional song. George Hamilton-IV (whose other 'hit' was "A Rose And A Baby Ruth") had a big country single of "Abilene". I'm certain he listed SOMEONE as the author/writer/composer/adapter/arranger/thief/whatever, but I've no idea at all whom that might've been.
O.K.---someone has "bothered to answer"!
Art