Krizis dvukhpartiĭnoĭ sistemy SShA : nakanune i v gody grazhdanskoĭ voĭny (konet͡s 1840-kh-1865 g.) / A.A. Kormilet͡s, S.A. Porshakov = The crisis of the U.S. : two-party system before and during the Civil War (the end of the 1840's-1865) / A.A. Kormilets, S.A. Porshakov.