title: Specific activity of uranium and thorium in marketable rock phosphate as a function of particle size.
mesh_terms: D005308:Fertilizers / Q000032:analysis; D005431:Florida; D010316:Particle Size; D010710:Phosphates / Q000032:analysis*; D011829:Radiation Dosage; D013910:Thorium / Q000032:analysis*; D014501:Uranium / Q000032:analysis*
chemical_list: D005308:Fertilizers; D010710:Phosphates; D014501:Uranium; D013910:Thorium