Looking for a garbage collection paper

The book "Garbage collection: algorithms for automatic dynamic memory
management" by Jones and Lins starts describing on page 197 a concurrent
garbage collection algorithm by Leslie Lamport and concludes on page 198 with
: "This colour change is done in a single instruction by an ingenious
reinterpretation of colour values by incrementing the value of a base colour
modulo 3: interested readers should consult [Lamport, 1976] for more
details."


Ok ; if it's ingenious , I want to read it. The reference is


        Leslie Lamport
        Garbage Collection with Multiple Processes: an Exercise in Parallelism
        Proceedings of the 1976 International Conference on Parallel Processing,
        T. Feng, ed., 50-54.


I did a bit of googling , arrived at
http://lamport.azurewebsites.net/pubs/pubs.html and it says "No electronic
version available". The entry on the page for the above paper references
"On-the-fly Garbage Collection: an Exercise in Cooperation" and I have
downloaded that but ideally I would also like to see the above paper. So I
was wondering whether anyone has a copy. If the algorithm is not too long ,
perhaps they can post it here (as pseudocode) ; or , if they are willing to
scan the paper , contact Lamport and ask him if he would like a scanned
version which he can put on his website.

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