Its most prominent members were Ivan Nikolaevich Efremov, Aleksandr Konovalov, and Pavel Ryabushinsky.
In the last two Dumas the Progressists entered into a coalition with the Constitutional Democrats, and in the Fourth Duma they were part of the Progressive Bloc (Russia).
After the February Revolution Efremov and Konovalov became part of the Provisional Government.
), McGraw-Hill Encyclopedia of Russia and the Soviet Union (1961), pp.
455-6 This article about a Russian political party is a stub.