Good Days for Black Rock

Here's a page from "Good Days for Black Rock," a Hit Parader article from 1970 that goes beyond the requisite Sly Stone and Jimi Hendrix mentions and and makes room for not just the Bar-Kays and Charles Wright but also Black Merda and Willie Feaster and the Mighty Magnificents. Sadly, none of the artists are interviewed, but has that Funkadelic image been published elsewhere?