Derek York has written:
'The earth's age and geochronology' -- subject(s): Geological time
Derek Andrew Jennings has written: 'The revival of the Convocation of York, 1837-1861' -- subject(s): Church of England, Government, York (England), York (England). Convocation, York (Province), York (Province). Convocation
Derek A. McDougall has written: 'Concerto'
Derek STANFORD has written: 'John Betjeman'
Derek Johnston has written: 'Rags & tatters'
Derek Ben.field has written: 'Murder for the asking'
DEREK BEAVEN has written: 'HIS COLDEST WINTER'
Derek Bateman has written: 'Unfriendly games'
Derek Blease has written: 'Projects for programs'
Derek Miller has written: 'Growth to freedom'
Derek Freeman has written: 'Report on the Iban'
DEREK WATSON has written: 'MOLOTOV: A BIOGRAPHY'
Derek MacNally has written: 'Positional astronomy'