TY - BOOK AU - Froyen, Richard T., author. AU - Greer, Douglas F., author. TI - Principles of economics / SN - 0023394307 U1 - DC 330 1989 PY - 1989/// CY - New York : Macmillan ; London : PB - Collier Macmillan, KW - Economics N1 - Includes bibliographical references and index ER -