URI:
       Index of /pdf/ibm/370/VS_APL
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   DIR /pdf/ibm/370
       GH20-9064-4_VS_APL_General_Information_197806.pdf
       LY20-8032-3_VS_APL_Program_Logic_Release_4_4th_ed_198108.pdf
       SH20-1872-0_VS_APL_for_TSO_Yale_Terminal_Users_Guide_197608.pdf
       SH20-9065-0_VS_APL_Installation_Reference_Manual_Jan76.pdf
       SH20-9065-1_VS_APL_Installation_Reference_Oct76.pdf
       SH20-9067-2_VS_APL_for_CMS_Terminal_Users_Guide_197812.pdf
       SH20-9182-1_VS_APL_for_CMS_-_Installation_Reference_Manual_Release_4.0_2nd_ed_198208.pdf