000			00330nam a2200133Ia 4500
008			151015s9999 xx 000 0 und d
020			_a9251022631
100			_aAyers, R.S
245			_aWater quality for Agriculture
260			_c1985
300			_axii 174p.
500			_aFAO irrigation and drainage paper
942			_cFAO _2udc
999			_c25093 _d25093