Krishna G. Kulkarni Jim Melton Jonathan Bauer Mike Kelley Inheritance for ADTs (revised) ANSI X2H2 DBL:KAW-006 X3H2-91-133rev1 July 1991 db/systems/sqlPapers.html#X3H2-91-133rev1 SQL/x3h2-91-133rev1.pdf db/systems/X3H2-91-133rev1.html