A new collection of documents on Soviet foreign policy in interwar period was published in 2011. Let’s see its bibliographical entry (the original book is in Russian). Moscow–Berlin: Policy and Diplomacy of the Kremlin, 1920–1941 (Moscow, 2011). Volume 1 (1926) has 1031 page. Volume 2 (1927–1932, six years) has 755 pages. Volume 3 (1933–1941, nine years, the most interesting period) has only 690 pages. It’s really a good illustration of today’s archival policy in Russia.