penck, a. r. . a. r. penck. drawings, a retrospective. october 24 - november 21 [1992], david nolan gallery [einladungskarte/ invitation card]. new york, david nolan gallery, 1992.
12,2 x 17,5 cm. orig. einladungskarte/ invitation card. photograph by gunter lepkowski, 1972. tadelloses exemplar/ mint copy.