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Published online by Cambridge University Press: 24 August 2009
* Obtainable from the Foundation's Agent, Box 1632, 1211 Geneva 1, Switzerland, on receipt of International Money Order or banker's cheque made out to The Foundation for Environmental Conservation for US $15 per copy for individuals or $25 for institutions (postage free in both cases). For contents of Environmental Challenges I and how to obtain copies, see inside of back cover of Environmental Challenges II or any recent issue of Environmental Conservation.