Links:

Theory - D Mixolydian Cheat Sheet
Collins-Pesky Minor Chords Conquered on Mandolin
Collins-Relative Minor Explained
YouTube - Cooley's Reel (with Tabs)
YouTube - Michael's Dad playing accordian
YouTube - Cooley's Reel mando lesson
Irish - Instruments and History of Irish music
Irish - Session list
Irish - BD Riley's session list
Irish - OFlaherty Retreat (see Learning/Student Resources)
Irish - OFlaherty Tune Collection
Irish - OFlaherty 100 Jigs and Reels (2005)
Irish - OFlaherty 100 More Tunes (2006)
Irish - OFlaherty Another 100 Tunes (2013)
Wagon Wheel - Darius Rucker