[Mp4-tech] h.263 standards

[jacques libchaber]

Hi everybody,
I have in my possession an ITU-T standard called H.263 whose date of
issue 
is 03/96. I assume that it is the first edition of the 'h263 video codec
standard'.
I've read that there exists also two other editions of the h263
standard.
They are named h263+ and h263++.
I guess that the h263++ standard is the one that was issued in 08/98. It
is also the one that you can get on the ITU website currently.
Does anyone know where I can get the h263+ standard ?
Thanks
               Jacques