CEA, 75 - Paris (France); International Union of Pure and Applied Physics; 470 p; ISBN 2-7272-0061-7; ; 1981; v. 5 p. 107; Commissariat a l'Energie Atomique; Paris, France; 17. International cosmic ray conference; Paris, France; 13 - 25 Jul 1981; Sold by Reidel, Dordrecht, Netherlands; Published in abstract form only.