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Published online by Cambridge University Press: 24 August 2009
* Also the title of the main keynote address to the Assembly — by Professor Ralph O. Slatyer, Chief Scientist in the Department of The Prime Minister and Cabinet, Canberra, ACT 2600, Australia, who subsequently submitted it to us for consideration for publication. This we are very pleased to undertake in revised form on pp. 7–12 of this issue. —Ed.