The Hammered Dulcimer by Norman Hughes. From the introduction:
This is a book to help you begin to learn to play the hammered dulcimer. It is arranged to be covered sequentially, with the exception of three reference sections on History, Stringing and Tuning Arrangments, and Music Theory. Includes standard musical notation for 28 songs.
Softcover, 9" x 12", 32 pages. Published by Mel Bay Publications, c. 1979. Moderate cover wear, a few spots and shallow creasing, but still in Good used condition, pages unmarked.