Why?
The first fake book I got when I got to NT (Fall 1974) perfectly (more or less...) reflected the esthetic of that discography.
Bebop had yet to become the music of the future. A LOT of shit was OOP. Aebersold was still looking for traction. Jerry Coker's book was kinda "advanced" for what it represented.
And yes, all those George Russell records. Meet the David Baker influence via the Aebersold clinics and elsewhere. Nobody was teaching the LCC, but David Baker was heavy teaching George Russell.
Oh yeah, I had a bit of infamy in 1974 for having a "lot" of Sonny Rollins records, ANY Lester Young records, and WTF is up with this Archie Shepp guy you like so much?