Spitzer, Frank 1926- Principles of random walk / [by] Frank Spitzer. - Princeton, N.J. : Van Nostrand, [1964]. - xi, 406 p. ; 24 cm. - The University series in higher mathematics . - 519.1 . Bibliography: p. 395-400. Subjects--Topical Terms: Random walks (Mathematics) Dewey Class. No.: 519.1