[fitswcs] LSR in Paper III

[Eric Greisen]

I have added a reference to Gordon in Methods of Experimental Physics
to the paper.

    http://www.aoc.nrao.edu/~egreisen/scs_050126.ps.gz
    http://www.aoc.nrao.edu/~egreisen/scs_050126.ps
    http://www.aoc.nrao.edu/~egreisen/scs_050126.pdf


Cheers,

Eric