Gray, Andrew, 1847-1925 A treatise on Bessel functions and their applications to physics / by Andrew Gray and G. B. Mathews ; edited by Thomas Murray MacRobert - 2nd ed. - London : Macmillan, 1922 - xiv, 327 p. ; 23 cm. Includes index Subjects--Topical Terms: Bessel functionsMathematical physics Dewey Class. No.: 517.353