Toft, Louis. Practical mathematics/ Louis Toft and Alexander McKay, - London, New York [etc.] Sir I. Pitman & sons, ltd., c1931. - v, 594 p. diagr. 22 cm. Includes index English LCCN: 32017568 Subjects--Topical Terms: Mathematics. LC Class. No.: QA37 / .T6 Dewey Class. No.: 510/TOP