Until her final years, Lucia Sutera — a retired ultrasonongrapher — never checked the cardboard barrels in her padlocked storage bin in her Brooklyn apartment building’s basement. A neighbor, the daughter-in-law of Stinson Records’ late owner Herbert Harris, had left them to her, mentioning that they contained unissued recordings by America’s populist poet laureate, Oklahoma-born Woody Guthrie (1912-67). ►