Theroux, James M. Techniques for improving educational radio programmes / James M. Theroux. - Paris : Unesco, c 1978. - 45 p. ; 30 cm. - Educational studies and documents, 30. . 331 331 ISBN: 92-3-101562-1 Subjects--Topical Terms: Educational planning. Dewey Class. No.: 371.333 / U2t