SOURCES.a60.txt is effectively the master file.

SOURCES.a60 is a canonical version in Unicode

These are generated from the Unicode file:

SOURCES.a60-b.html
SOURCES.a60.html
SOURCES.a60-ul+b.html
SOURCES.a60-ul.html

The above were prepared with a newer, better, formatter
which is currently hosted on my home linux.  The c* files
in this directory were prepared with an earlier formatter
which is not as good and indeed may have some errors introduced
into the text.  These will be removed later.

In future I will use the Unicode files as the definitive
and canonical master copies of Algol programs.  They make
it much easier to convert to and from multiple formats.