In LA LUPA MANNERA - Felicita Fanni plays the woman who gets her head smashed in, in the car by Annik Borel. I remember her because she also appeared in LE DEPORTATE DELLA SEZIONE SPECIALE SS as Mara (I think that was her name) as one of the slightly older inmates. It has been a long time since I saw both films.
As for Maria Renata Franco, yes, she is the woman with the horse in EMANUELLE IN AMERICA, because, again I recognise her from LE DEPORTATE - surprisingly she actually keeps her clothes on in this one, when most of the other actresses who play prisoners appear naked.
I don't think she is in EMANUELLE: PERCHÉ VIOLENZA ALLA DONNE, I don't recognise her. And I agree with Johan, I don't think Elisabetta Terribile is Juliet Graham under a pseudonym. Paul Thomas is in the film and not credited, and it seems like lots of non European stars were often credited in Italian movies at the time or had their names spelt wrong. Considering Juliet Graham did some pretty extreme hardcore films it is interesting that her scenes in EMANUELLE are, though nasty, not very graphic.