[1] MAX PLANCK INST NUCL PHYS,D-6900 HEIDELBERG,FED REP GER
[2] UNIV HEIDELBERG,INST MINERAL PETROG,D-6900 HEIDELBERG 1,FED REP GER
[3] UNIV CONSTANCE,INST ALTE GESCHICHTE,D-7750 CONSTANCE,FED REP GER
[4] UNIV MUNICH,INST KRISTALLOG & MINERAL,D-8000 MUNICH 2,FED REP GER