TTBB Chorus,Voice - Level 3 - Digital Download SKU: A0.1456668 By John Denver. By John Denver. Arranged by Thomas Hartmann. 20th Century,A Cappella,Barbershop,Folk,Singer/Songwriter. Barbershop Quartet. 3 pages. Thomas Hartmann #1034653. Published by Thomas Hartmann (A0.1456668). Non-contestable barbershop like arrangement of this classic.