海量图书期刊资源，随时随地畅享阅读乐趣
Soil loss: An overviewV.A. Kovda · 1976
Introduction: Fifty years progress in soil scienceF.A. Van Baren; V.A. Kovda · 1974
Soviet pedology to the 10th international congress of soil science (the centenary of soil science in Russia)V.A. Kovda; G.V. Dobrovolsky · 1974