WASET
Suyana, J. , Komariah, K. , Senge, M.. "Conservation Techniques for Soil Erosion Control in Tobacco-Based Farming System at Steep Land Areas of Progo Hulu Subwatershed, Central Java, Indonesia". World Academy of Science, Engineering and Technology, Open Science Index 41, International Journal of Agricultural and Biosystems Engineering (2010), 4(5), 287 - 294.