Cite
APA Citation
Institution,, B. S. (1989). Guide to construction and use of 6.30 mm (0.25 in) magnetic tape cartridge using GCR for data interchange, recording at 394 ftpmm(10 000 ftpi), 39 cpmm (1 000 cpi).. London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100103935736.0x000001