Amazons of the Avant-garde: Alexandra Exter, Natalia Goncharova, Liubov Popova, Olga Rozanova, Varvara Stepanova and Nadezhda Udaltsova (Guggenheim Museum Publications) Some of the most outstanding exhibitions organized by the Solomon R. Guggenheim Museum have been those that have presented the art of the Russian avant-garde. In Amazons of the Avant-Garde: Alexandra Exter, Natalia Goncharova, Liub