Managerial economics : text, problems, and short cases / Milton H. Spencer, K. K. Seo, Mark G. Simkin. Spencer, Milton H. Seo, K. K., joint author. Simkin, Mark G., joint author. Managerial economics. Industrial management Decision making. HD58.5 .S64 1975 658 4th ede. SPM Includes index. Homewood, Ill. : R. D. Irwin, c1975. c1975. 1975 Text xi, 562 p. : eng The Irwin series in economics.