Nelson GCSE Modular ScienceDavid Horrocks, Averil Macdonald, Paul Collison, David Kirkby · First published 2001Open the Tome
At Home in the UniverseRudolf Steiner, Paul Margulies, Harry Collison · First published 2000Open the Tome
Th e effect of the ionosphere on Merlin observations and radio studies of spiral galaxiesPaul Michael Collison · First published 1994Open the Tome