Originally:
Lomax, Alan, Woody Guthrie, and Pete Seeger. Hard Hitting Songs for Hard-hit People. Oak Publications, 1967. (Includes transcriptions of songs collected from Jim Garland, Sarah Ogan Gunning, and Aunt Molly Jackson.)
Currently:
Lomax, Alan, Woody Guthrie, and Pete Seeger. Hard Hitting Songs for Hard-hit People. University of Nebraska Press, 2012.