oks by , ▁R ik ky , ▁Dr ▁Vic ▁Gam mon ▁et ▁al . ▁The ▁Fol k ▁Hand book . ▁( 2 0 0 7 ). ▁Back be at ▁ ▁Sh arp , ▁Cec il . ▁Fol k ▁Song : ▁Some ▁Con clus ions . ▁ 1 9 0 7 . ▁Charles ▁River ▁Books ▁ ▁Sh arp , ▁Cec il ▁English ▁Fol k ▁Songs ▁from ▁the ▁Southern ▁App al ach ians . ▁Collect ed ▁by ▁Cec il ▁J . ▁Sh arp . ▁Ed . ▁Ma ud ▁Kar p eles . ▁ 1 9 3 2 . ▁London . ▁Oxford ▁University ▁Press . ▁▁▁ ▁van ▁der ▁Mer we , ▁Peter ▁( 1 9 8 9 ). ▁Orig ins ▁of ▁the ▁Popular ▁Style : ▁The ▁An te ced ents ▁of ▁Tw enti eth - Cent ury ▁Popular ▁Music . ▁Oxford : ▁Clar end on ▁Press . ▁. ▁ ▁External ▁links ▁▁▁ ▁Fol k ▁Alliance ▁International ▁Prom inent ▁folk ▁music ▁organization ▁ ▁Ben ▁Gray ▁L ump kin ▁Digital ▁Fol k ▁Music ▁Collection ▁Howard ▁B . ▁W alt z ▁Music ▁Library , ▁University ▁of ▁Colorado ▁B ould er ▁▁▁ ▁Free ▁scores ▁( song s ) ▁at ▁www . trad itional - song s . com ▁▁▁ ▁The ▁Trad itional ▁Music ▁in ▁England ▁project , ▁World ▁and ▁Trad itional ▁Music ▁section ▁at ▁the ▁British ▁Library ▁Sound ▁Archive ▁ ▁The ▁Fol k ▁File : ▁A ▁Fol kie ' s ▁Dictionary ▁by ▁Bill ▁Mark wick ▁( 1 9 4 5 – 2 0 1 7 ) ▁– ▁musical ▁definitions ▁and