Southwell, R. V. b. 1888 Relaxation methods in theoretical physics: a continuation of the treatise, "Relaxation methods in engineering science". - Oxford: Clarendon Press, 1956-. - v. 2. - Oxford engineering science series . Subjects--Topical Terms: Mathematical physics.Difference equations.Harmonic functions. Dewey Class. No.: 530.15 / S728r