Murray, Francis J. 1911- The theory of mathematical machines/ [by] Francis J. Murray. - New York: King's crown press, 1947. - 1 p.l., v-vii, 116 p.: illus., diagrs., 28 x 22 cm. Bibliography: p. 115-116. LCCN: 47003194 Subjects--Topical Terms: Mathematical instrumentsCalculators. Dewey Class. No.: 004.015 / M981t