Boulez, Pierre. (1925–2016) Signed Letter to his record producerInteresting typed letter signed from the important French composer and conductor. 1 page, 16 April, 1968, to his recording producer, Thomas Z. Shepard. Apologizing for his delayed reply, but noting that he has listened to the edited and mixed test pressing of his recent Bartok Stravinsky recording made with the BBC Orchestra. He goes on to thank TZS for fixing the first edit and mix as performed by another producer and that he wants TZS to do all the