Crowder, Norman A. The arithmetic of computers; an introduction to binary and octal mathematics / Norman A. Crowder. - Garden City, N.Y., Doubleday, 1960. - 472 p. 22 cm. - A Tutor text . LCCN: 60013380 Subjects--Topical Terms: Numeration--Programmed instruction.Algebra--Programmed instruction. LC Class. No.: QA43 / .C85 1960 Dewey Class. No.: 513.52 / CRA 1960