TY - BOOK AU - AU - USDA, TI - Proceedings of an international workshop : sustainable land use systems research, New Delhi, India , February 12-16,1990 SN - 8120406699 U1 - 631.4707 PY - 1992/// CY - New Delhi PB - Oxford & IBH Publishing Co.Pvt.Ltd. KW - Soil science ER -