URI:
       Index of /pdf/dg/magtape
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   DIR /pdf/dg
       015-000040-04_6020_Series_Tape_Transport_Technical_Manual_197712.pdf
       015-000079-00_6026_TechRef_May78.pdf
       015-000080-01_Model_6026_Magnetic_Tape_Subsystem_1979004.pdf
       015-000080_6026_Magnetic_Tape_Subsystem_197904.pdf