Work on Ch.9
Merge pull request #4 from CdLbB/master

Some small typos fixed in 7.3 plus an incorrect reference in the original fixed.
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Work on Ch.9
Searching for bad compilation in Ch.9; looks to be multi-paragraph emphasis
Fixed bad compilation in Ch.9
Fixed small typos in Ch.9
Work on Ch.9
Add some index entries in Ch.9
Work on 9.2
Work on 9.2
Work on 9.2.1
Fix few small typos in sections 7.4-6