[Music of the Avant-Garde] Source: Music of the Avant-garde, Issue No. 9An extraordinary endeavor with stunning typography, beautifully designed, multiple paper stocks, multi colored scores, LPs. **NB: This copy lacking the famous "fur music."** 13. 5 x 10. 75 inches, bound with plastic spiral comb. "Source" was and remains a seminal source for materials on the heyday of experimental music and arts. Conceived in 1966 and published to 1973, it included some of the most important composers and artists of the time. A