Ulf Helldén
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- 1998
-
Mark
Comments on dryland degradation assessment; In:Drylands-Sustainable Use of Rangelands into the Twenty-first Century
1998) p.25-30(
- Chapter in Book/Report/Conference proceeding › Book chapter
- 1995
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Mark
Ökenspridning-ett lokalt problem?
1995) In Naturvetenskapliga forskningsrådet. Årsbok 1995 “Det evigt rinnande vattnet”. ss 131-142. p.131-142(
- Contribution to journal › Article
- 1994
-
Mark
Desertification, fact or fiction?
1994) In Our Planet. -The United Nations Environment Programme Magazine for Sustainable Development, 6(No. 5). p.33-33(
- Contribution to journal › Article
- 1993
-
Mark
Land Cover Conversion, Land Degradation and Desertification in Africa and Asian Drylands-An Assessment of Regional and Continental Change
1993) Int. Symp. on Remote Sensing in Arid and Semi-arid Regions-(
- Chapter in Book/Report/Conference proceeding › Paper in conference proceeding
-
Mark
An Approach to Monitoring and Assessment for Planning and Management in African Drylands
1993) Int. Symp. on "Natural Resource Inventory and Sustainable Management of Forested Areas in Africa" p.9-14(
- Chapter in Book/Report/Conference proceeding › Paper in conference proceeding
- 1992
-
Mark
Estimation of the forest cover and its changes over time by means of remote sensing in semi-arid Africa.
1992) p.47-68(
- Chapter in Book/Report/Conference proceeding › Book chapter
- 1991
-
Mark
Desertification-Time for an Assessment?
(
- Contribution to journal › Article
-
Mark
Rapport från ett internationellt möte om ökenspridning
(
- Contribution to journal › Article
- 1988
-
Mark
National Drought Impact Monitoring- A NOAA NDVI and precipitation data study of Ethiopia
1988) In Lund Studies in Geography, Ser. C. General, Mathematical and Regional Geography(
- Book/Report › Report