Beckman, Theodore N., 1895-1973. Credits and collections in theory and practice / Theodore N. Beckman [and] Robert Bartels. - 6th ed. - New York : McGraw-Hill , c1955. - xi, 612 p. : illus. ; 23 cm. Includes index. Subjects--Topical Terms: Credit.Collecting of accounts. Dewey Class. No.: 658.88 / BEC 1955