URI:
       Index of /pdf/macrolink
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   DIR /pdf
       200720_Perkin-Elmer_8lineMux_1982.pdf
       201250_Perkin-Elmer_DR11_Intf_Jul86.pdf
       202700_MIDC_Jun84.pdf
       202776_Perkin-Elmer_SCSICtlr_Dec88.pdf
       202900_MACRO-3_SMDctlr_Feb85.pdf
       Macrolink_PADLA_1979.pdf
       RDV_Engineering_QALTA_1978.pdf