Seeking information about long-past US AGM

Is anyone a member of the US Richard III Society who would help my US friend? Here's her request:- "Can someone find out when the US RIII Society AGM was held in Boston? I don't know if it was 1989, 1990, or 1991, although I'm pretty sure it wasn't the latter year. Or maybe there is someone who has the archives here (US) who could give me some info about that AGM?" My friend was a member at that time, and attended the AGM, but no longer has all her papers to tell her exactly when it was, etc. Maybe someone can suggest who to approach?". Sandra =^..^=