It isn't, according to Cambridge Dictionary:
https://dictionary.cambridge.org/grammar/british-grammar/possession-john-s-car-a-friend-of-mine#google_vignette
Very sad news indeed...
He also compiled excellent discographies of Doug Watkins, Wardell Gray, Hank Mobley, Ike Quebec, and even Charlie Parker.
R.I.P. Claude!
😞
So sad to hear about Claude’s passing. He was an excellent discographer, and a true enthusiast. Plus he was a very nice and generous human being…
R.I.P. Claude