Henderson, J. Vernon. Principles of economics / J. Vernon Henderson, William Poole. - Lexington, Mass. : D.C. Heath, c1991. - 1 v. (various pagings) : ill. (some col.) ; 27 cm. Includes bibliographical references and index. ISBN: 0669201731 LCCN: 90084759 Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .H423 1991 Dewey Class. No.: 338.5 / HEP 1991