1. Datos sobre la influencia del selenio en la vegetatión cuando sustituye el ion sulfúrico en el líquido nutritivo de Knop;Awschalom;Rev. Facult. Agron. La Plata,1921
2. The occurrence of selenium and seleniferous vegetation in Wyoming. II. Seleniferous vegetation of Wyoming;Beath;Univ. Wyoming Agric. Exp. Sta. Bull.,1937
3. Selenium distribution in and seasonal variation of type vegetation occurring on seleniferous soils;Beath;Jour. Amer. Pharm. Assoc.,1937
4. Selenium injury to wheat plants and its inhibition by sulphur;Hurd-Karrer;Jour. Agric. Res.,1934
5. Factors affecting the absorption of selenium from soils by plants;Hurd-Karrer;Jour. Agric. Res.,1935