Cite
HARVARD Citation
Institution,, B. (1981) Specification for information interchange on 3.81 mm (0.150 in) magnetic tape cassette at 4 cpmm (100 cpi), phase encoded at 63 ftpmm (1600 ftpi). [Online]. London : British Standards Institution. Available from: http://access.bl.uk/ark:/81055/vdc_100103704390.0x000001