Does anyone know where I can get a list of instruments played (studio or live)? I'm really interested in Robert's Harps and what keys he used.... As my auld faither said when he heard When the Levee Breaks "Aye that laddie can blaw"

Hi all this is my first post in the forum...... 35 years since Physical Graffiti was released....I can't stop playing it. Absolutely awesome work!