Operational methods in applied mathematics, by H. S. Carslaw and J. C. Jaeger. Carslaw, H. S. (Horatio Scott), 1870-1954. Jaeger, J. C. (John Conrad), 1907- joint author Calculus, Operational Differential equations QA432 .C34 510 CAO Oxford, The Clarendon Press, 1941. 1941. 1941 Text xvi, 264 p. : eng