Duckweed competition

John Hewitson john_hewitson at breathe.co.uk
Wed Nov 11 02:48:01 EST 1998


More ideas about duckweed at:

http://www-saps.plantsci.cam.ac.uk/osmos/os6.htm



John Hewitson (Oundle School)
Berrystead Barn, Oundle, Peterborough PE8 4DY UK
Phone and Fax +44 (0) 1832 272209
email john_hewitson at breathe.co.uk




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