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-40%Guide to construction and use of 90 mm (3.5 in) flexible disk cartridges for data interchange, using modified frequency modulation recording at 7958 ftprad, 5.3 tpmm (135 tpi) on 80 tracks on each side. Dimensional, physical and magnetic characteristics
Published by Publication Date Number of Pages BSI 09/30/1988 36 BS 6958-1
$103.63