00300nam a2200097Ia 4500008004100000082002200041100001700063245006900080260004500149300000800194140113s9999 xx 000 0 und d a631.416/.417 L6 a"Bolt, G.H." aSoil Chemistry : A Basic element (Developments in soil science) a1976bElsevier Publishing Co.cAmsterdam a281