S & L references

[rjp6]

Apologies for bothering the list with this, but somebody posted a couple of
S & L references at the end of last week, which I seem to have inadvertently 
deleted.  Is there any chance that they could please send them to me again?

Thanks in advance.

        Rich Parkin,
        Case Western Reserve,
        Cleveland, OH
        [EMAIL PROTECTED]
        (216) 368-4294 (w)