Whose song is My Dear Companion (with Dolly Parton & Linda Ronstadt)?

Artist		Album
Emmylou Harris		Songbird - Rare Tracks And Forgotten Gems - Disc 3 Songbird... Rare Tracks & Forgotten Gems Songbird... Rare Tracks & Forgotten Gems - Disc 03 Songbird: Rare Tracks And Forgotten Gems (CD3)