颁布单位:[University of the Free State] |
颁布时间:1971 |
实施时间:1971 |
学科分类:[["Phosphatic, fertilizers","Soils, --, South, Africa, --, Northern, Cape, --, Vaalharts","Soils, --, Phosphorus, content","Dissertation, (M.Sc.Agric., (Soil, Science))--University, of, the, Free, State,, 1971"]]