00473nam a2200133Ia 4500008004100000082002200041100005900063245005300122260002700175300000800202942000700210952010500217999001700322140113s9999    xx            000 0 und d  a631.84:631.4   K9  a"Britain, Agriculture & Fisheries & Food (Min. of�)"  aNitrogen and soil organic matter. Tech. Bull. 15  a1969bH.M.S.O.cLondon  a178  cBK  00104070aVTLbVTLd2014-01-13l0o631.84:631.4   K9pVBK1270r2014-01-13 00:00:00w2014-01-13yBK  c57948d57948