MacRobert, Thomas Murray 1884-1962. Spherical harmonics : an elementary treatise on harmonic function s with applications / by T.M . MacRobert ; with twenty diagrams. - 2nd ed. rev. 1947. - London : Methuen , 1927 - xv, 372 p. : ill. ; 22 cm. Subjects--Topical Terms: Spherical harmonics.Harmonic functions. Dewey Class. No.: 517.352