None of those recordings were ever released. The Berea College stuff is available on line at:
http://www.aca-dla.org/index.php
You'll need to do some hunting, but there are some 21 songs recorded at festivals there. The three Atlanta Historical Society "sides", hopefully, reside in their archive! Anyone here from Atlanta who could check with them?
Peter B.
Thanks for pointing the way, Peter. A bunch of them are here, at the world's longest url:
http://www.aca-dla.org/cdm4/results.php?CISOROOT=all&CISOOP1=any&CISOFIELD1=creato&CISORESTMP=results.php&CISOVIEWTMP=item_viewer.php&CISOMODE=grid&CISOGRID=thumbnail%2CA%2C1%3Btitle%2CA%2C1%3Bsubjec%2CA%2C0%3Bdescri%2C200%2C0%3Bpublis%2CA%2C0%3B20&CISOBIB=title%2CA%2C1%2CN%3Bsubjec%2CA%2C0%2CN%3Bdescri%2CK%2C0%2CN%3B0%2CA%2C0%2CN%3B0%2CA%2C0%2CN%3B10&CISOTHUMB=2%2C5&CISOTITLE=10&CISOBOX1=buddy+moss&x=22&y=11