"Proceedings of a round-table seminar organised by the Commission of the European Communities, Directorate-General Science, Research, and Development, Environment Research Programme, held in Liebefeld, Switzerland, 8-10 May 1985."
Proceedings of a Round-Table Seminar organized by the Commission of the European Communities, Directorate-General for Science for Research and Development Programme, Liebefeld, Switzerland, 8-10 May 1985.
Factors influencing sludge utilisation practices in Europe.
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Sewage disposal in the ground-- Europe, Congresses.