Some references for the writing course I held in Cambridge yesterday:

My article "Scientific Writing":  http://www.geocities.com/michaelgrr/BFI0206.pdf

Robert Schoenfeld, The Chemist's English: http://www.amazon.co.uk/exec/obidos/ASIN/3527280030/

Barry Turner, The writer's handbook 2006: http://www.amazon.co.uk/exec/obidos/ASIN/1405041544/