TY - BOOK ED - International Institute of Tropical Forestry. TI - Annual letter 1998-99 U1 - 634.90913 21st ed. PY - 2000/// CY - Puerto Rico PB - International Institute of Tropical Forestry KW - Agriculture KW - Forest management KW - Forestry KW - Research institutes KW - Tropical forestry KW - Watersheds ER -