MacRobert, Thomas Murray, 1884-1962. Spherical harmonics : an elementary treatise on harmonic functions with applications / by T.M. MacRobert. - 2nd rev.ed. - London : Methuen & co. ltd., 1947 - 372p. : ill. ; 23 cm. Include index. Subjects--Topical Terms: Spherical harmonics. Dewey Class. No.: 515.53 / MAS 1947