"Home on the Range" is a classic western folk song sometimes called the "unofficial anthem" of the American West.
 The lyrics were originally written by Dr. Brewster M. Higley of Smith County, Kansas, in a poem entitled "My Western Home" in 1872.
 In 1947, it became the state song of the U.S. state of Kansas.
 In 2010, members of the Western Writers of America chose it as one of the Top 100 western songs of all time.
Fugitive Valley is a 1941 American film directed by S. Roy Luby, one of the Range Busters series of western films.
Boot Hill Bandits is a 1942 American film directed by S. Roy Luby, one entry in the Range Busters series.
Saddle Mountain Roundup is a 1941 American film directed by S. Roy Luby, one of the Range Busters series.
Tonto Basin Outlaws is a 1941 American film directed by S. Roy Luby, the tenth of the entries in the Range Busters series.
 Despite the film's title, the action takes place in Montana, not Arizona's Tonto Basin.
 Like the other of the Range Busters series, the film was shot at Corriganville Movie Ranch and used footage from silent Westerns.
The Range Busters was a film series of 24 Westerns of the adventures of a trio of cowboys, many filmed at the Corriganville Movie Ranch, produced by George W. Weeks and distributed by Monogram Pictures.
 The series used "Home on the Range" as its theme song with each film featuring the heroes waving goodbye and promising to return in another adventure.
John 'Dusty' King (born Miller McLeod Everson, July 11, 1909 – November 11, 1987) was a singer and film actor renowned for his Westerns particularly the Range Busters series.
Underground Rustlers is a 1941 American film directed by S. Roy Luby, one of the films in the Range Busters series.
 The film is also known as Bullets and Bullion (US review title).
Trail Riders is a 1942 American film directed by Robert Emmett Tansey, one of the Range Busters series.
Wild Horse Stampede is a 1943 American Western film, directed by Alan James and starring Ken Maynard and Hoot Gibson playing marshals with their own names in the manner of Gene Autry and Roy Rogers.
 It was the first of eight Monogram Pictures "The Trail Blazers" film series, replacing the studio's Range Busters series.

Question: What classic western song is the theme to the Range Busters series?
Answer: Home on the Range