Theoria: Historical Aspects of Music Theory Vol 21 By Frank Heidlberger (Editor) Books / Paperback Art & Performing Arts › Music Publisher: The University of North Texas Press, January 2014 Price $11.88 Free Shipping Send to a friend Used - Very Good Very Good condition. Volume 21. (music study) $11.88 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.