Barker, Vernon C. Essential mathematics with applications Vernon C. Barker and Richard N. Aufmann. - Boston Houghton Mifflin c1982. - 286 p. ill. 28 cm. 1 instructor's answer booklet. Spine title: Essential mathematics. Includes index. LCCN: 82082928 Subjects--Topical Terms: Arithmetic--1961. LC Class. No.: QA107 / .B37 1982