4th and 5th Editions refer to a reference manual.   Check out the 4th
Edition man pages:
https://www.tuhs.org//Archive/Distributions/Research/Dennis_v4/

running cc.1 thru nroff reveals:

SEE ALSO

       `C reference manual'

The .th macro dates the man page as 03/15/72

I know I learned C by reading the UNIX source code and having some sort of
a reference manual with the 5th edition; but I can not find a document in
my archives.  I'll keep looking but I syspect that was lost.

Clem
ᐧ

On Thu, Nov 1, 2018 at 9:20 AM Lars Brinkhoff <lars@nocrew.org> wrote:

> Hello,
>
> Which revisions of the "C Reference Manuals" are known to be out there?
>
>
> I found this:
> https://www.bell-labs.com/usr/dmr/www/cman.pdf
>
> Which seems to match the one from V6:
>
> https://github.com/dspinellis/unix-history-repo/tree/Research-V6-Snapshot-Development/usr/doc/c
>
> "C is also available on the HIS 6070 computer at Murray Hill and and on
> the IBM System/370 at Holmdel [3]."
>
>
> But then there's this:
>
> https://www.princeton.edu/ssp/joseph-henry-project/unix-and-c/bell_labs_1369_001.pdf
>
> "C is also available on the HIS 6070 computer ar Hurray Hill, using a
> compiler written bu A. Snyder and currently maintained by S. C. Johnson.
> A compiler for the IBM System/360/370 series is under construction."
>
> Due to the description of the IBM compiler, it seems to predate the V6
> revision.
>
> Both above revisions use the =+ etc operators.
>
>
> Finally, this version edited by Snyder:
>
> https://github.com/PDP-10/its/blob/master/doc/c/c.refman
>
> "In addition to the UNIX C compiler, there exist C compilers for the HIS
> 6000 and the IBM System/370 [2]."
>
> This version documents both += and =+ operators.
>