Halmos, Paul R. 1916- A Hilbert space problem book/ Paul R. Halmos. - Princeton, N.J.: Van Nostrand, [1967]. - xvii, 365 p.: 24 cm. - The University series in higher mathematics. . Bibliography: p. 352-357. LCCN: 67003639 //r84 Nat. Bib. No.: GB67-10951 Subjects--Topical Terms: Hilbert space---Problems, exercises, etc. Dewey Class. No.: 515.7 / H194h