Listen to different versions at NPR's Present at the Creation: Home on the Range: Vernon Dalhart (1927), James Richardson (1939), Gene Autry (1943), Frank Sinatra (1946), and Central Heights Elementary Chorus (2002). Moreover, Paul Brown performed the song "as it probably sounded when Dan Kelley first put Dr. Brewster Higley's poem 'My Western Home' to music." According to Meade et al.'s Country Music Resources (p. 395), Dalhart's recording ("A Home On The Range," rec. 04/02/1927) is the earliest, and resembles the original version.
Bing Crosy's is HERE.
~Masato