International Biological Programme

Methods of study in soil ecology. Proceedings of the Paris symposium organized by Unesco and the International Biological Programme UNESCO 1970 Productivity of forest ecosystems. Proceedings of the Brussels symposium organized by Unesco and the International Biological Programme (27-31 October 1969) UNESCO 1971 The assessment of population affinities in man Weiner J.S 1972 The Biological basis of freshwater fish production edited by Shelby D. Gerking 1967 Trace element metabolism in animals general editor: C. F. Mills 1970