1. Determination and isotope-ratio analysis of different forms of nitrogen in soils—I. Apparatus and procedure for distillation and determination of ammonium;Bremner,1965
2. Determination and isotope-ratio analysis of different forms of nitrogen in soils—3. Exchangeable ammonium, nitrate, and nitrite by extraction-distillation methods;Bremner,1966
3. Hydrogen Ions;Britton,1955
4. The nature of the catalyst causing the hydrolysis of urea in soils;Conrad;Soil Sci.,1940
5. The occurrence and origin of urease like activities in soils;Conrad;Soil Sci.,1942