Audio-visual techniques for industry.
Contributors: Martin-Harris, Roy.; United Nations Industrial Development Organization.
Series: Development and transfer of technology series -- no. 6
Publisher: United Nations
Published: 1878
Place of publication: New York
Language: eng
Number of pages: 84
Subjects: Audio-visual equipment.; Audio-visual materials.
Notes: At head of title: United Nations Industrial Development Organization, Vienna.

"Prepared for the United Nations Industrial Development Organization (UNIDO) by John Halas and Roy Martin-Harris"--Pref.