細節
Mark Tobey (American, 1890-1976)
Forms in Progress I, 1971; Erker Presse No 21, 1970; Head (Brown), 1970; Head, 1970
signed, dated and numbered '32/60 Tobey 1971'; '28/52 Tobey 1970'; 'E.d.a. 1970 Tobey 1970'; ''3/100 Tobey 1971' in pencil (lower margin)
lithograph in colours, unframed
488 x 620 mm.; 410 x 305 mm.; 560 x 457 mm.; 560 x 454 mm. (4)