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Published online by Cambridge University Press: 24 August 2009
* At the recent large and well-patronized Recycling Trade Fair and Congress, of which an account will be published in due course in a later issue of this Journal, the sheet of paper on which were hand-written the names and addresses of purchasers at the Fair, unfortunately disappeared near the Fair's end, so that copies of this further Supplement cannot be supplied to those purchasers unless they identify themselves at latest shortly after its publication in mid-1994.