IEC 60574-15 Ed. 1.0 b:1984, Audiovisual, video and television equipment and systems. Part 15: Audio pages

Applies to sheets, one side of which is completely coated with a magnetic recording medium, for educational, audio-visual and other applications. Specifies sheet dimensions, shape and size of magnetic track and the area available for visual information. Audio pages are intended to have audio information recorded on the magnetically coated side, related to visual information printed on the other side. The recorded information is reproduced by means of a rotating magnetic head. This title may contain less than 24 pages of technical content.