From the July/August 2020 issue of Acoustic Guitar | By Jamie Stillway Known for their deft guitar duos and close harmony singing, the Delmore Brothers (Alton and Rabon) were popular performers on the Grand Ole Opry in the 1930s. In the introduction to Alton's intriguingly titled autobiography, The Truth Is Stranger Than Publicity, music historian Charles Wolfe recognizes the duo’s…