author : Duncan Steel

Books

• (Marking Time. 2000)
• (Target Earth. 2000)

Papers/Articles

• The Thirty-Three Year English Protestant Calendar. 2000. In The Greatest Inventions of the Past 2000 Years

Books : reviews

Duncan Steel. Marking Time: the epic quest to invent the perfect calendar. Wiley. 2000

 

Duncan Steel. Target Earth: how rogue asteroids and doomsday comets threaten our planet. Time Life. 2000