Hallmark hall of fame. Amahl and the night visitors [MP] 1951-12-24 credits (choreographer, John Butler)
Performing arts biog. master index, 1981 (John Butler; b. 1920)
The making of a dance, 1976 t.p. (choreographed by John Butler) foreword (Medea, world premiere, Spoleto, June 29 [1975])
Int. dict. of modern dance, c1998 (Butler, John; John Nielson Butler; b. Sept. 29, 1920, Memphis, Tenn., d. Sept. 11, 1993, New York City; American dancer and choreographer)