退耕还林(草)和降雨变化对延河流域土壤侵蚀的影响
Effect of Returning Farmland to Forest (Pasture) and Changes of Precipitation on Soil Erosion in the Yanhe Basin
中国农业科学 . 2009, (2): 569 -576 .  DOI: 10.3864/j.issn.0578-1752.2009.02.023