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found: Shephard, W.H. The Dionysus group, 1990: CIP galley (Performance Group; N.Y. improvisational theatre group)
found: Dionysus in 69, c1970: t.p. (The Performance Group) 1st p. of text (f. 11/15/67)
found: LC data base, 3/16/90 (hdg.: The Performance Group)