@article{article, title = {An evaluation of soil erosion intensity mapping from SPOT satellite imagery by studies of colour air-photos and top-soil content of 137 Cesium in Monitoring soil loss at different observation levels. Case studies of soil erosion in the Lesotho Lowlands}, author = {}, year = {1990}, pages = {13-37}, howpublished = "\url{https://eurekamag.com/research/073/993/073993160.php}" }