00491nam a2200157Ia 4500003000400000008004100004082001600045100002600061245007900087250001200166260005100178300001300229650003400242650004100276650001600317OSt170901s1955    xx            000 0 und d  a631.8bC50C  aCollings, Gilbeart H. 0aCommercial Fertilizers : their sources and use / bby Gilbeart H. Collings  a5th ed.  a.- BombaybTata McGraw-Hill Publishingc, 1955  axi,617p.  aTechnology (Applied Sciences)  aAgriculture and Related Technologies  aFertilizers