The NPR web site has an article (with playlist) on Turkish progressive rock of the past four decades. I was a fan of Barış Manço as a teen in Turkey in the early ’70s. I particularly liked his song ‘İşte Hendek İşte Deve’ (on the playlist), which I had on 45. ‘Dağlar Dağlar‘ was also good. He once played at a club around the corner from me but I missed him. Dang!
(h/t Megan Clark)