Hamburger, H. L. Linear transformations in n-dimensional vector space : an introduction to the theory of Hilbert space / by H.L. Hamburger and M.E. Grimshaw. - Cambridge [Eng.] : University Press, 1951 [reprinted 1956] - vii, 195 p. : 23 cm. Includes Index Subjects--Topical Terms: Transformations Dewey Class. No.: 511.326 / HAL 1956