lower left in graphite on left panel: A/B; lower center in graphite on right panel: B/B; lower right in graphite on right panel: S.P. BALDESSARI
Marks and Labels
FM: Gemini stamp (center verso of left panel: BS: Gemini copyright  and chop (lower center of right panel); FM: Gemini stamp (center verso of right panel)
Gemini G.E.L., Los Angeles; gift to NGA, 2001
- Best Impressions: 35 Years of Prints and Sculpture from Gemini G.E.L., National Gallery of Art, Washington, 2001-2002, as A French Horn Player, A Square Blue Moon, and Other Subjects: Two Bowlers (with Questioning Person).
- The Serial Impulse at Gemini G.E.L., National Gallery of Art, Washington; Los Angeles County Museum of Art, 2015.
- Gem. 1610
- Ritchie, Charles. Gemini G.E.L. Online Catalogue Raisonné. National Gallery of Art, Wshington, DC, 2001.