1. A model for relating land use and groundwater quality in southern Missouri;Aley,1977
2. Determination and isotope-ratio analysis of different forms of nitrogen in soils: I. Apparatus and procedure for distillation and determination of ammonium;Bremner,1965
3. Steam distillation methods for determination of ammonium, nitrate and nitrite;Bremner;Geochim. Cosmochim. Acta,1965
4. Denitrification and isotopic fractionation in two contrasting marine environments: the eastern tropical North Pacific Ocean and the Cariaco Trench;Cline,1973
5. Ammonia volatilization from surface applications of ammonium compounds on calcareous soils. I. General theory;Fenn,1973