IntroductionArticles are listed on a single page for each volume from volume 21 (1983) to date, with the page numbers, titles and authors listed by issue -- generally there were six issues per year, but see the Pagination page for details of variations.
The letters after each entry show the type of article, as follows:
[S] Short article - up to 1 page
[M] Medium-length article - 1-3 pages
[L] Long article - over 3 pages
(SWL90) - in the index, an article in the Stamp World London 90 special issue (see Note 6 in the Pagination table)