- A single unnumbered "Trial Issue" was published in late 1987, then regular monthly publication started with Volume 1, no. 1 (July 1988).
- Regular publication stopped with the Volume 11, no. 6 issue (December 1998). No issues were published during all of 1999, 2000, and 2001.
- Publication resumed in 2002 with Volume 11, no. 7 (January 2002), but stopped again with Volume 11, no.12 (June 2002). Volume 11 therefore spans the years 1998-2002 but does not include 1999-2001.
- No issues have been published since June 2002.
Prepared by Thomas R. Harrington, October, 2004.