Atelier Robertson (1927–1933):: Dancer Trude Engelhart. From a group of four dance studies (Niddy Impekoven, Ellinor Bahrdt, Trude Engelhart and Ira Langenteels), ca. 1928. Each with the photographer’s studio stamp and handwritten annotations in pencil on the reverse. | src Ostlicht (Westlich) Photo Auction nº 14 (June, 2016) | hi-res here
Andrei Teleshev :: Acrobatic pose. Artist’s photographic print, mounted oval photograph. AT [Andrei Teleshev repository. Collection of the Teleshev family, Moscow]. | src Nicoletta Misler’s The Russian Art of Movement 1920-1930