found: His Head comix, 1968.
found: Bukowski, C. There's no business, 1984:CIP t.p. (R. Crumb) copr. p. (Robert Crumb)
found: Philippe, R. Political graphics, c1982:p. 325 (Crumb, Robert; b. Philadelphia, 1943)
found: Wikipedia, Sept. 20, 2010(Robert Crumb, known as R. Crumb; b. Robert Dennis Crumb, Aug. 30, 1943, Philadelphia, Pa.; American artist, illustrator, and musician)
found: R. Crumb sketchbook, 2017- :volume 2, page following colophon (Robert Crumb)
found: R. Crumb's music sampler, ℗2005:container (R. Crumb and his Keep-on-Truckin' Orchestra)
found: Canadiana, December 16, 2019(access point: Crumb, R.; full name Robert Crumb)
