A good place to start is Williamson Murray's chapter on comparative British, French, and German tank development in the anthology Military Innovation in the Interwar Period. Mary Habeck's Storm of Steel: The Development of Armor Doctrine in Germany and the Soviet Union, 1919–1939 traces the parallel and at times intertwined developments of both Germany and the USSR's tank arms in the 1930s. Steven Zaloga's contributions to the Osprey Duel series such as Panzer 38(t) vs BT-7: Barbarossa 1941 and Panzer IV vs Char B1 bis are useful, compact analyses of tanks in combat. Zaloga tends to treat these "duels" as clashes between opposing systems and parallel developments, so his Duel books tend to have a good deal of information on the interwar period. By the same token, Zaloga's New Vanguard books also have good coverage of early war tanks. Jeffrey Clarke's Military Technology in Republican France: The Evolution of the French Armored Force 1917–40 is an older work, but does dissect the French experience of the 1930s. The debate over the tactical value of fast versus heavy tanks sometimes obscures other factors that went into procurement and creation of a tank arm. One of the revelations of John Sweet's Iron Arm: The Mechanization of Mussolini's Army, 1920-1940 was that the Italian Army relied on light tanks and tankettes in no small measure because they were the only types of tanks that Italian industry could deliver in any appreciable volume. For the Red Army, David Glantz's numerous works are indispensable. His Stumbling Colossus: The Red Army on the Eve of World War gives a good overview of how the legacies of the 1930s impacted the Red Army in June 1941. Glantz spearheaded a historiographical revolution of the 1990s that brought about a fundamental reevaluation of the Red Army and its concepts such as "Deep Battle." Sally W. Stoecker's Forging Stalin's Army: Marshal Tukhachevsky and the Politics of Military Innovation is emblematic of this type of post-Glantzian scholarship and has an entire chapter devoted to Tukhachevsky's impact on tank development and procurement. Richard Harrison's Architect of Soviet Victory in World War II: The Life and Theories of G.S. Isserson sketches out the biography and impact of one of the architects of Deep Battle. Harrison recently gave a lecture on Isserson that gives a good overview of Isserson and his ideas. To Change an Armny: General Sir John Burnett-Stuart and British Armored Doctrine, 1927-1938 by Harold R. Winton details the life of another reformer like Isserson, but one who was far less successful at leaving an imprint on his nation's armored forces.