000			00357nam a2200133Ia 4500
008			140113s9999 xx 000 0 und d
082			_a631.459:631.61 G6
100			_a" Ayres, Quincy Claude"
245			_aSoil erosion and its control
260			_b"New York : McGraw-hill book company, 1936"
300			_a365p.
650			_aSoil erosion
942			_cBK
999			_c64116 _d64116