Conference proceedings.

90CH2866-2 v.1; 91CH3106-2 v.1 1991; 90CH2866-2 v.2; 00CB37119 v.2; 91CH3106-2 v.2 1991; 00CB37119 v.3; 91CH3106-2 v.3 & 4 1991; 92CH3223-5 v.1 1992; 92CH3223-5 v.2 1992; 93CH3286-2 v.1 1993; 93CH3286-2 v.2 1993; 93CH3286-2 v.3 1993; 93CH3286-2 v.4 1993; 93CH3286-2 v.5 1993; 94CH3417-3 v.1 1994; 94CH3417-3 v.2 1994; 95CB35787 1995; 96CB36007 v.1 1996; 96CB36007 v.2 1996; 97CB36162 v.1 1997; 97CB36162 v.2 1997; 98CB36229 v.1 1998; 98CB36229 v.2 1998; 99CB37030 v.1 1999; 99CB37030 v.2 1999; 00CB37119 v.1 2000; 01CH37239 v.1 2001; 01CH37239 v.2 2001; 02CH37368 v.1 2002; 02CH37368 v.2 2002; 02CH37368 v.3 2002; 03CH37503 v.1 2003; 03CH37503 v.2 2003; 03CH37503 v.3 2003; 03CH37503 v.4 2003; 04CH37582 v.A 2004; 04CH37582 v.B 2004; 04CH37582 v.C 2004; 05CH37710 v.1 2006; 05CH37710 v.2 2006; 05CH37710 v.3 2006; 05CH37710 v.4 2006; 05CH37710 v.5 2006; 04CH37582 v.D