Student workbook [for] Economics : an introduction to analysis and policy / Block, Michael K Bach, George Leland, Demmert, Henry G., Economics 330 PRE 1977 A077 Or. "... designed specifically to accompany G. L. Bach's introductory text, Economics : an introduction to analysis and policy, 9th ed. ..." Englewood Cliffs, N. J. : Prentice-Hall, c1977 c1977 Text ix, 406 p. ;