Kovda V. A. Draft programme for international cooperation in the field of studies and utilization of the soil cover of the world: Report for un on environmental problems (UNEP) / V.A. Kovda. 1978
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Kovda V. A. Draft programme for international cooperation in the field of studies and utilization of the soil cover of the world: Report for un on environmental problems (UNEP) / V.A. Kovda. 1978
Draft programme for international cooperation in the field of studies and utilization of the soil cover of the world: Report for un on environmental problems (UNEP) / V.A. Kovda