TY - BOOK AU - Mitchell,D.S TI - Aquatic vegetation and its use and control SN - 9231010824 PY - 1974/// CY - Paris PB - Unesco KW - Aquatic weeds KW - Control KW - Aquatic plants KW - Economic aspects N1 - 'A contribution to the International Hydrological Decade'; Fiche header: 84M0242 UNESCO ER -