FYI - the 75th birthday special 2-CD/DVD set available from
the usual purveyors - link her to Amazon:
Joan Baez 75th Birthday media

https://www.amazon.com/Joan-Baez-Birthday-Celebration-Combo/dp/B01E6B1F0W/ref=sr_1_1?s=music&ie=UTF8&qid=1465753705&sr=1-1&keywords=joan+baez+75th+birthday+celebration

Impressive line-up of performers, including Jackson Browne, Mary Chapin Carpenter, Judy Collins, David Crosby, Indigo Girls, Emmylou Harris, Damien Rice, Paul Simon, Mavis Staples, Nano Stern and Richard Thompson.

One of my favorite Joan Baez albums is the one she had suppressed:
Joan Baez in San Francisco (Fantasy, also reissued by Bear Family)
These were her first recordings, released only after she became
a phenomenon and the Veritas and Vanguard first releases.
What delights me about it is the repertoire reflects the pop music
of our generation - early rock&roll, calypso, etc. I remember a night at a "folk" venue in Houston in the late 1960's after the
shows ended, a bunch of the performers sat around and sang many
of these same songs.

Happy Birthday Joan!

Thomas.