DS/EN 29661/A1:1993 Information processing - Data interchange on 12.7 mm (0.5 in) magnetic tape cartridges - 18 tracks, 1491 data bytes per millimetre (37871 data bytes per inch) -Technical Corrigendum 1
1996DS/EN ISO/IEC 9661:1996 Information technology - Data interchange on 12,7 mm wide magnetic tape cartridges - 18 tracks, 1 491 data bytes per millimetre
1993DS/EN 29661:1993 Information processing. Data interchange on 12,7 mm (0.5 in) magnetic tape cartridges. 18 tracks, 1491 data bytes per millimetre (37871 data bytes per inch)