Sheet Music, I'm An Old Cowhand From the Rio Grande. As Sung By Bing Crosby in The Paramount Picture, Rhythm On The Range. Words and Music by Johnny Mercer. 1936 Leo Feist Music New York Copyright. Six Pages. Unmarked Condition. Covers show normal creasing. Pictures give a good representation of Sheet Music Condition. Last Picture shows what a Ready Made 12x16 Mat with a 9x12 Picture Opening can do for overall Piece Presentation.