TY - BOOK AU - Barbier,Edward AU - Acreman,Mike AU - Knowler,Duncan TI - Economic valuation of wetlands: a guide for policy makers and planners SN - 294007321X U1 - 336.73 22 PY - 1997/// CY - Gland, Switzerland PB - Ramsar Convention Bureau KW - Wetlands KW - Economic aspects. ER -