10.1.4 Page references

When one says ‘\pagerefstrue’ (LaTeX only), index references are made by page numbers rather than module numbers or LaTeX section numbers. If there is more than one section per page, they are identified by ‘a’, ‘b’, ‘c’, etc., such as ‘section 17b’. (Presently, this will not work correctly when multicol is used for the body of the document.)

The information necessary to process page references in this way is written into the aux file. As is usual with LaTeX, several runs may be required for the references to be fully consistent with the source file.