000			00292nam a2200109Ia 4500
001			85921
008			170722s9999 xx 000 0 und d
100			_aAllen, John Rl
245			_aCurrent ripples. _bTheir relation to patterns of water and sediment motion. /
260			_c1968.
942			_cGEN
999			_c79941 _d79941