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Ammonium phosphates --- Ammonium phosphates --- Ammonium phosphates --- Environmental aspects --- Toxicology --- Transportation
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Igneous rocks --- Alkalic igneous rocks --- Carbonatites --- Carbonatites --- Phosphates --- Phosphates
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Geology, Stratigraphic --- -Phosphates --- -Phosphates --- -Geology --- -Geology --- -Niobrara Formation
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