23 1 50 YAMAHA Primary Author mixed material [s.l] Yamaha Foundation for Music Education 1973 YAMAHA Primary Author mixed material [s.l] Yamaha Music Foundation 1973 YAMAHA Primary Author mixed material Japan Yamaha Foundation for Music Education 1973 YAMAHA MUSIK Primary Author mixed material [s.l.] [s.n.] [s.a] YAMAHA Primary Author mixed material Japan Yamaha Music Foundation 1983 YAMAHA Primary Author mixed material YAMAHA Primary Author mixed material Tokyo Yamaha Music Foundation 1974 YAMAHA Primary Author mixed material Yamaha Music Foundation 1972 YAMAHA Primary Author mixed material Yamaha Music Foundation 1973 YAMAHA Primary Author mixed material [s.l.] Yamaha Music Foundation [s.a.] YAMAHA Primary Author mixed material [s.n.] [s.l.] [s.a.] YAMAHA Primary Author mixed material Yamaha Music Foundation YAMAHA Primary Author mixed material [s.l] Yamaha Music Foundation 1973 YAMAHA Primary Author mixed material Tokyo Yamaha Foundation for Music Education 1973 YAMAHA Primary Author mixed material [s.l] Yamaha Foundation for Music Education 1973 YAMAHA Primary Author mixed material [s.l] Yamaha Foundation for Music Education 1973 YAMAHA Primary Author mixed material [s.l] Yamaha Music Foundation 1973 YAMAHA Primary Author mixed material [s.l] Yamaha Foundation for Music Education 1973 YAMAHA Primary Author mixed material Tokyo Yamaha Foundation for Music Education 1972 mate course, Vol. 2 YAMAHA Primary Author mixed material [s.l] Yamaha Music Foundation 1974 YAMAHA Additional Author mixed material Tokyo Yamaha Foundation for Music 1973 YAMAHA Additional Author mixed material Tokyo Yamaha Foundation for Music Education [s.a.] YAMAHA Additional Author mixed material [s.l.] Yamaha Foundation for Music Education 1973