Dobbs, David E. A modern course on the theory of equations/ David E. Dobbs and Robert Hanks ; interior artwork by Jose Garcia. - Passaic, NJ: Polygonal Pub. House, c1980. - vii, 216 p.: ill.; 24 cm. Includes bibliographies and index. ISBN: 0936428031 LCCN: 80013487 Subjects--Topical Terms: Equations, Theory of. Dewey Class. No.: 512.94