1. The effect of some cations on the permeability of cells to water;Baptiste;Ann. Bot.,1935
2. Burgess , Paul S. F. R. Pember 1923 “Active” aluminum as a factor detrimental to crop production in many acid soils Rhode Island Agric. Exp. Sta. Bull. 194
3. The colorimetric determination of phosphorus;Fiske;Jour. Biol. Chem.,1925
4. Die Bindung der Phosphorsäure in Erdboden;Gaarder;Medd. Vestlandets Forstlige Forsoksstation,1930
5. The biogeochemistry of aluminum and of certain related elements;Hutchinson;Quart. Rev. Biol.,1943