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Equilibria in the ammonium carbamate-urea-water system
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The determination of urea alone and in the presence of cyanamide by means of urease
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Synthesis of urea from ammonia and carbon dioxide
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KRASE NW, 1930, IND ENG CHEM, V22, P3088
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Ammoniation of peat for fertilizers
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1930, OFFICIAL METHODS ANA, P21