July 20-25. Fourteen amateur groups are participating in this edition, with a predominance of modern European jazz. Amateur participants: The Jazztette, founded in Yorkshire in 1976; Tagore, German, in 1976; Tante Tillies Fordvarmere, Danish, in 1968; Joe Douglas Trio, in 1977, London; Casaquemada Jazz, in 1977, Madrid; Owertown Kids, 1973, Switzerland; Neighbours, 1974, from Australia; Prague Big Band Combo, Czech; Gold Washboard, 1971, Polish; Michel Klotchkoff Trio, 1971, French; Noctett, in 1974, German; Catalonia Jazz Group, 1977, Catalan; New Orleans Nappers, French. Professional participants: Pasadena Roof Orchestra, British; Johnny Arthy, John Parry, Bob Renvoice, Andy Pummell, Fran White, McWhite, Clive Baker, Peter Durrent, John Barron, S. Foxter, M. Henry and B. O'Neill. Winners: Michel Klotchff Trio. Modern. Shivananda, Swiss, 1973; Crash Group; Juan Carlos Calder n Jazz-Tett. Lee Konitz. Jimmy Rowles Trio. Clark Terry and Sonny Rollins. Tante Tillies Fodvarmere (traditional). Individual awards to Antonio Peral of Catalonia, saxophone; A. Lawrence, drummer of the English trio Joe Douglas; and Hans Peter Hotz, banjo player, of the Swiss Over Town Kids.