Carslaw, H.S. An introduction to the infinitesimal calculus : notes for the use of science and engineering students / H.S.Carslaw, - 3rd ed. - London : Angus and robertson ltd, c1937 [ reprint 1943] - xii, 137 p. ; 21 cm. Subjects--Topical Terms: Calculus. Dewey Class. No.: 515 / CAI 1943