Most volumes cover two years.
No years of publication printed on pieces, 1984-2009.
Publisher's statement indicates quarterly, however copyright dates suggest two to three issues published yearly, 1984-2008.
One issue published for 2012?
Numbering adjusted, by using issue numbers v. 24, no. 3A and v. 24, no. 3B, to account for resumption of quarterly publication in 2013. Actual numbers per year may sometimes vary despite stated resumption of quarterly publication, <2013->