Halas, John.
Audio-visual techniques for industry / [prepared for the United Nations Industrial Development Organization (UNIDO) by John Halas and Roy Martin-Harris]. - New York : United Nations, 1978. - ix, 84 p. : ill. ; 30 cm. - Development and transfer of technology series ; no. 6 . - [Document] - United Nations ; ID/203 . - United Nations. Document ; ID/203. .
78112091
Audio-visual equipment.
Audio-visual materials.
JX1977 TS2301.A7 / .A2 ID/203
300/.8 s 621.38
Audio-visual techniques for industry / [prepared for the United Nations Industrial Development Organization (UNIDO) by John Halas and Roy Martin-Harris]. - New York : United Nations, 1978. - ix, 84 p. : ill. ; 30 cm. - Development and transfer of technology series ; no. 6 . - [Document] - United Nations ; ID/203 . - United Nations. Document ; ID/203. .
78112091
Audio-visual equipment.
Audio-visual materials.
JX1977 TS2301.A7 / .A2 ID/203
300/.8 s 621.38