000			00385nam a2200133Ia 4500
008			151015s9999 xx 000 0 und d
020			_a9251037922
100			_aPearson, C. J. ; Norman, D. W. ; Dixon, J.
245			_aSustainable dryland cropping in relation to soil productivity
260			_c1995
300			_axi 146p.
500			_aFAO soils bulletin no- 72
942			_cFAO _2udc
999			_c24521 _d24521