6th Session / European Forestry Commission, Working Party on Torrent Control, Protection from Avalanches and Watershed Management : Italy, 29 August - 8 September 1962

Working Party on Torrent Control Food and Agriculture OrganizationEuropean Forestry Commission Food and Agriculture Organization

出版	Food and Agriculture Organization of the United Nations, 1962
URL	http://books.google.com.hk/books?id=sAb1MgEACAAJ&hl=&source=gbs_api