Helgason, Sigurdur, 1927- Differential geometry and symmetric spaces / Sigurdur Helgason - New York : Academic Press, 1962. - xiv, 486 p. ; 24 cm. - Pure and applied mathematics, 12 . - Pure and applied mathematics (Academic Press) ; 12. . Includes index and bibliography. Subjects--Topical Terms: Geometry, Differential.Symmetric spaces. Dewey Class. No.: 516.36 / HED 1962