A fascinating period in Russian art- lovely collage.
Nadezhda Andreevna Udaltsova (December 29, 1885-January 25, 1961) was a Russian avant-garde painter and educator. Udaltsova was affiliated with Cubism and later with Suprematism.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Nadezhda_Udaltsova
At the Piano by Nadeshda Udaltsova
1915 / Oil on canvas / 42″x35-1/16″ / Yale University Art Gallery, New Haven, CT
Nadeshda Udaltsova on Artnet: http://www.artnet.com/artists/nadezhda-andreevna-udaltsova/