论文信息 - World map of the status of human-induced soil degradation: L.R. Oldeman, R.T.A. Hakkeling and W.G. Sombroek, Published by the International Soil Reference and Information Centre (ISRIC) and funded by the United Nations Environment Programme (UNEP). 1990. Price US$25.- (unfolded US$20.-) - 字舞流文

World map of the status of human-induced soil degradation: L.R. Oldeman, R.T.A. Hakkeling and W.G. Sombroek, Published by the International Soil Reference and Information Centre (ISRIC) and funded by the United Nations Environment Programme (UNEP). 1990. Price US$25.- (unfolded US$20.-)

A. J. Thomasson

[1] H. Dregne. Soil and water conservation: a global perspective , 1986 .

[2] Harold Brookfield,et al. Land degradation and society , 1988 .