General Music Chat

There are a few accurate manuscripts and video tutorials for vocal harmonies for: Eagles, Beach Boys, Beatles, Toto.
However I can't find any for Crosby, Stills, Nash (and Young). Nor can I find any isolated separated tracks.
Does anyone have a source or link? Specific songs of interest:
- CSN&Y: Carry On.
- Eagles: Heartache Tonight.
- Toto: Rosanna.

Thanks,
JoelKeyboards
San Francisco Bay Area