Eicher, Jean-Claude; Unesco. (1982). The economics of new educational media / by Jean-Claude Eicher...[et al.]. Paris :: Unesco,.
Eicher, Jean-Claude; Unesco. The economics of new educational media / by Jean-Claude Eicher...[et al.]. Paris :: Unesco,, 1982
Eicher, Jean-Claude; Unesco. The economics of new educational media / by Jean-Claude Eicher...[et al.]. Paris :: Unesco,, 1982.