TY - RPRT TI - Federal Information Processing Standards Publication: parallel recorded magnetic tape cartridge for information interchange, 4 track, 0.250 inch (6.30 mm), 1600 bpi (63 bpmm), phase encoded PY - 1981 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS FIPS 93 DO - 10.6028/NBS.FIPS.93 ER -