Barker Jack. Fundamentals of mathematics Jack Barker, James Rogers, James Van Dyke. - 6ta ed. - Orlando, Fl Harcourt Brace & Co. 1994. - xvi,656,ans.1-ans.13,A.1-A.5,E.1-E.5, I.1-1.5 Includes bibliographical references (p.5, 4th set) and index. ISBN: 0030031540 Subjects--Topical Terms: Arithmetic