Stephens, Eugene, The elementary theory of operational mathematics, by Eugene Stephens ... - 1st ed. - New York, London, McGraw-Hill Book Company, inc., 1937. - xi, 313 p. 1 illus., diagrs. 21 cm. - Electrical engineering texts . Series title also at head of t.-p. Subjects--Topical Terms: Calculus, Operational.Differential equations, Linear.MCE Dewey Class. No.: 510.246213 / STE