TY - BOOK AU - Tripathi,R.P. AU - Singh,H.P. TI - Soil erosion and conservation SN - 8122403020 U1 - 631.45 20 PY - 1993/// CY - New York, NY PB - J. Wiley KW - Soil erosion KW - Soil conservation N1 - Includes bibliographical references and index ER -