1. Weitere Beiträge zur Kenntnis der Tabakpflanze;Behrens;III. Die Bewurzelung des Tabaks. Die Landwirtschaftlichen Versuchsstationen.,1893
2. A comparison of the hydrometer method and the pipette method for making mechanical analysis of soils, with new directions;Bouyoucos;Amer. Soc. Agron. Jour.,1930
3. The wilting coefficient for different plants and its indirect determination;Briggs;U. S. Dept. Agric. Bur. Pl. Ind. Bul.,1912
4. Root development of cotton, peanuts, and tobacco in central Oklahoma;Bruner;Oklahoma Acad. Sci. Proc.,1932
5. Notes on root variation in some desert plants;Cannon;Plant World,1913