tel. (+48 +42) 6786431 ext. 31 tel. (+48 +42) 6783223 ext. 31
tel. (+48 +42) 6786431 ext. 20 tel. (+48 +42) 6783223 ext. 20
National Centre for Nuclear Research Cosmic Ray Laboratory 90-950 LODZ 1, P.O.Box 447 POLAND
Barbara Szabelska