SingletonDr John Singleton, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, Tel: 01865 272236, Fax: 01865 272400, Email: j.singleton1@physics.ox.ac.uk. Leave of absence Aug 2000- Aug 2001: National High Magnetic Field Laboratory, Los Aamos National Laboratory, Mail Stop E536, Los Alamos, NM 87545, USA, Tel: +1 505 665 3857, Fax: +1 505 665 4311, Email: jsingle@lanl.gov Read More Read Less