The AAP DTD has been succeeded by ISO 12083[?].
This article (or an earlier version of it) contains material from FOLDOC, used with permission.
... Paul Anka 1981 Joni Mitchell 1982 Neil Young 1983 Glenn Gould 1986 Gordon Lightfoot 1987 The Guess Who[?] 1989 The Band 1990 Maureen Forrester[?] 1991 ...