Cite
MLA Citation
British Standards Institution,. 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). London : British Standards Institution, 1981. http://access.bl.uk/ark:/81055/vdc_100103704390.0x000001