The articles text is obviously copywrite but the originals, not copies, can sold like any book, but not turned into another format, like CD, for sale.
They have included the index probably when the accountant saw CDs of indexes being sold eg for Model Engineer, so copies or cd scans of the index page would also be copywrite.
However the information the idex page contains is in the public domain becasue they have been published. I am not a legal expert but I think you can freely take such information and retype it into a new publication in your own words with a credit to the source. That is just the same as a citation or reference being put in an article or technical journal.
Have you tried googling "model engineer index" or "Railway modeller index" then "model Boats index". Looks like the boaters are behind the times.
Typical record from the ME index:
Volume","Issue","Page","Category","Title","Part","Author","Notes"
"121,,,,"All rights unless specifically released reserved Bill Phillips and Chris Orchard 1998-2009",,,
121,3031,8,"Workshop","Changing the Cellar into a workshop",,"Denis Horler","Vibration, secure fixing, single line distribution diagram, curves showing cutting speeds"