I just ran across a digital archive of Radical America, an SDS associated magazine that began in 1967. I downloaded a pdf of an issue at random and it was focused on black workers. It had some cool poetry, a couple of long articles about DRUM which I’d never seen and these great images accompanying the writing, credited to Dorothy Higginson. The early issues especially have a zine-like feeling to them. A great resource and worth a perusal!