102 x 70 cm. (40.2 x 27.6 in.) ...

22 x 16.8 cm. (8.7 x 6.6 in.) ...

The couple was instrumental in formalising the Blok Group, of which Szymon Syrkus was a member, in the Praesens group (1926–1929), which was founded by the spouses and named by Helena, and in the ...