000			00346nam a2200157Ia 4500
008			160615s9999 xx 000 0 und d
100			_aGRAY(A N)
245			_aPhosphates and superphosphate
260			_aLondon
260			_bE T Heron & Co
260			_c1944
300			_a416 p.
942			_cBooks
999			_c3238 _d3238