[1] RHEIN WESTFAL TH AACHEN,INST PHYS 1,D-5100 AACHEN,FED REP GER
[2] UNIV BONN,INST PHYS,D-5300 BONN,FED REP GER
[3] UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND
[4] DESY,DEUTSCH ELEKTR SYNCHROTON,D-2000 HAMBURG,FED REP GER
[5] UNIV HAMBURG,INST EXPTL PHYS 2,D-2000 HAMBURG 13,FED REP GER
[6] UNIV LONDON IMPERIAL COLL SCI & TECHNOL,DEPT PHYS,LONDON SW7 2AZ,ENGLAND
[7] UNIV AUTONOMA MADRID,MADRID 34,SPAIN
[8] OXFORD UNIV,DEPT NUCL PHYS,OXFORD OX1 3RH,ENGLAND
[9] UNIV LONDON QUEEN MARY COLL,DEPT PHYS,LONDON E1 4NS,ENGLAND
[10] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
[11] UNIV GESAMTHSCH SIEGEN,FACHBEREICH PHYS,D-5900 SIEGEN,FED REP GER
[12] WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL
[13] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706