SULPHUR CYCLING ON THE CONTINENTS: WETLANDS, TERRESTRIAL ECOSYSTEMS AND ASSOCIATED WATER BODIES (SCOPE 48), edited by R. W. Howarth (Cornell University, Ithaca, NY, USA), J. B. Stewart (University of Saskatchewan, Canada) and M. V. Ivanov (USSR Academy of Sciences, Russia) 350 pp. John Wiley, Chichester, England (1992). ISBN 0#x2013;471#x2013;93153#x2013;5. U. S.$ 169,#x2014;.
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