In our continuing study the work of Joni Mitchell, especially regarding her work popularizing open tunings, we look to "You Turn Me On I'm a Radio" from her 1974 album For The Roses, which was recorded in open D.
Read more about Joni Mitchell's open tunings: https://goo.gl/VRNuet
Shop Joni Mitchell albums on Reverb LP: https://goo.gl/xyqj7y