Gray, Andrew, 1847-1925. A treatise on Bessel functions and their applications to physics / by Andrew Gray and G. B. Mathews. - 2d ed. prepared by A. Gray and T. M. MacRobert. - London : Macmillan and co., 1952. - xiv, 327 p. : ill. ; 23 cm. Include bibliography and index. Subjects--Topical Terms: Bessel functions.Mathematical physics. Dewey Class. No.: 515.53 / GRT 1952