The economics of new educational media /
United Nations
- 2nd ed.
- New York : United Nations, c1980.
- 316p. : 22 cm.
"United Nations publication sales no. E.83.IX.5"--T.p. verso. "01200"--T.p. verso.
Includes bibliographical references.
84135970
Education
371.3 / UNE
"United Nations publication sales no. E.83.IX.5"--T.p. verso. "01200"--T.p. verso.
Includes bibliographical references.
84135970
Education
371.3 / UNE