[alt-photo] Clerc and am fe citrate

[Alberto Novo]

I am looking for the chemical definition brown ammonium ferric citrate given 
by Clerc. I remember a footnote in:
Clerc, L.P. (1950) "La Technique Photographique"
5th Ed, tome II, Publications photographiques et cinematographiques Paul 
Montel, Paris V, 1950, pp.816-817
I have had the oppportunity of taking some notes about the empirical formula 
of the green form, but unfortunately I did not save the information about 
the brown one.
Now I nave not the opportunity to look at Clerc anymore. May you help me? 

Alberto
www.grupponamias.com
www.alternativephotography.com/wp/photographers/rodolfo-namias-group