[TUHS] unix seventh questions

[zmkm zmkm]

Hi all 

the v7 rl02 dsk from archive , seems to be missing the /usr/sys , any ideas on how to restore it ? , 
also in the v7 as man page , there's reference to “unix assembler manual” by DMR , which I tried to locate without luck , the only thing available is the assembler reference manual , in v7 manual volume 2 , is it by any chance same documents under different name ? .

thanks in advance for the help 
zmkm
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