Langsam, W.C. . The World Since 1919 / Textual Documents W.C. Langsam & Otis C. Mitchell. - 8th ed. / - Delhi : Surjeet Publications , 1997. - 742p. ; 22cm. Subjects--Index Terms: History-World G-Geography Dewey Class. No.: 909.08 / La 22 Wo