ON-LINE COLLECTIONS OF AMERICAN SOURCE RECORDINGS

The following collections have online recordings of American Folk music. I was hoping that people with the knowledge would select and post links to give easy access to recordings of important American source singers and musicians???

HELEN HARTNESS FLANDERS BALLAD COLLECTION https://archive.org/details/helenhartnessflanders
The Digital Library of Appalachia https://dla.acaweb.org/digital/search/searchterm/music/field/all/mode/all/conn/and/order/nosort
BRITISH LIBRARY SOUNDS https://sounds.bl.uk/
THE AMERICAN FOLKLIFE CENTER https://www.loc.gov/folklife/folkcat.html
The Library of Congress National Jukebox http://www.loc.gov/jukebox/
The Global Jukebox https://theglobaljukebox.org/