Actually it is a P# followed by S and the figures. For exemple: P-S123 not S-123, for military issues which are in SCWPM specialized issues is P-M4 not S-4 or whatever.----- There is no need to change that.
OK.
But then how do we get that catalog I mentioned listed under the P reference, as I can only see the 'SCWPM 1961- present' catalog listed there at present?
What about the '1368-1960' Catalog and the 'Specialised Issues' (which has a different author).