Economics : an introductory program
Foster, Edward ,1933-
Economics : an introductory program - McGraw-Hill New York 1970 [1970] - xv, 379 p.26 cm.
Economics -- Programmed instruction.--HB
HB171.5.F696
Economics : an introductory program - McGraw-Hill New York 1970 [1970] - xv, 379 p.26 cm.
Economics -- Programmed instruction.--HB
HB171.5.F696