In a message dated 99-11-22 08:53:04 EST, you write:

<< Speaking of Roman numerals, I have just received for review a volume
 published by Teubner, using the date MIM - ouch.  I thought there were
 conventions against this sort of thing, and a learned press such as Teubner
 ought to know better. >>

I am not sure if it was on this list or mediev-l, but a short while ago the 
conventions of Roman numerals were discussed.  After a number of postings and 
some research it became obvious that there is no hard and fast rule of what 
is appropriate.