by ROGER HIGHFIELD and CELIA HALL
Published in The Gazette (Montreal) (21.12.2005)

by Roger Highfield and Celia Hall
Published in Daily telegraph (London, England : 1969) (20.12.2005)

by Roger Highfield and Celia Hall
Published in Daily telegraph (London, England : 1969) (15.10.2005)

by Celia Hall and Roger Highfield
Published in Daily telegraph (London, England : 1969) (04.04.2002)

by Roger Highfield Celia Hall and Auslan Cramb
Published in Daily telegraph (London, England : 1969) (09.02.2005)

by Thomas Harding Roger Highfield and Celia Hall
Published in Daily telegraph (London, England : 1969) (11.01.2003)

by Celia Hall Medical Editor and Roger Highfield Science Editor
Published in Daily telegraph (London, England : 1969) (29.12.2004)