TY - BOOK AU - x, x AU - Greenland,D.J & Lal,R TI - Soil Conservation and management in the humid tropics: x SN - 8170891035 U1 - 631.4/S683 PY - 1989/// CY - India PB - International book distributors KW - Soil science KW - Soils N1 - Includes ER -