Economics : principles and applications / John W. Kennedy [and] Arthur R. Olsen. Kennedy, John Wesley, 1920- Olsen, Arthur R. (Arthur Robert), jt. aut. Economics. HB171.5 .K44 1972 330 KEE Seventh ed., 1967, published under title: Applied economics. Includes index. Cincinnati, Ohio : South-Western, 1972 1972 1972 Text xii, 611 p. : eng