lower right in plate: SPIELER; lower center in plate: STEVENSON; signed by artist, lower right under platemark, in graphite: Gangolf; by later hand, verso lower margin, in graphite: Die Spieler (Stevenson) G- 246/300-21324; by later hand, verso lower left, in blue pen and ink: 25 [circled]
(Jörg Maass Kunsthandel, Berlin); Ruth Cole Kainen, Washington, D.C., purchased February 26, 2007; gift to NGA, 2012.
- Rathenau, Ernest. Im Memoriam Paul Gangolf. Berlin: Euphorin Verlag, 1964, undescribed.