Systems, Convention Cards and Conventions peculare to Precision
Lot of writ-up of systems. I'm currently interested In Revision 4.0 (Precision)
see my modifications on this site.
by David Berkowitz & Brent Manley
Variation on Ghestem, uses micheals as 2 higher unbid and 3C as top & bottom unbid
Has lots of conventions on its site
Encyclopedic knowledge all on biridge