05-11-2013, 05:19 PM
Alan, I might have posted that link sometime in the past, can't remember exactly, yes quite an informative document.
I was trying to get my head round the different types ie: De Sauty's, Schering, Maxwell, Wein etc etc.
Lawrence.
I was trying to get my head round the different types ie: De Sauty's, Schering, Maxwell, Wein etc etc.
Lawrence.







