000			00399 a2200193 4500
260			_aParis.
100			_aMITCHELL, D.S.
260			_bUNESCO
245			_aAquatic vegetation and its use and control.
300			_a135p.
260			_c1974
300			_bIll.
130			_lFr.
710			_aUNESCO.
690			_avegetation.
020			_a92-3-101082-4
999			_c26259 _d26259