Boehnel, G, H, H.(1978).Proceedings of the International Symposium on Remote Sensing for Observation and Inventory of Earth Resources and the Endangered Environment, July 2-8, 1978, Freiburg, Federal Republic of Germany .:.
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Boehnel, Gerd, Hildebrandt;, H.-J.."Proceedings of the International Symposium on Remote Sensing for Observation and Inventory of Earth Resources and the Endangered Environment, July 2-8, 1978, Freiburg, Federal Republic of Germany".:,1978.Text.