Martens G.G. A couple, gouache on paper 85,6 x 64,6 cm> more information
Martens G.G. A nude in the artist's studio, black chalk on paper 48 x 32,5 cm, signed r.c. and painted ca. 1931> more information
Martens G.G. Dancing couples, coloured chalk on paper 20,2 x 16 cm, signed with signature stamp l.r.> more information