1. BALDWIN I. L. AND FRED E. B. 1927 The fermentation characters of the root nodule bacteria of the leguminosae. Soil Sci. 24 217-230.
2. Die Bacterien der Papilionaceen-Knollchen;BEIJERIN K, M;Bot. Zeit.,1888
3. Kiinstliche Infection von Vicia Faba mit Bacillus radicicola;BEIJERINCK M. W.;Bot. Zeit.,1890
4. What names should be used for the organisms producing nodules on the roots of leguiminous plants;BUCHANAN R. E.;Proc. Iowa Acad. of Sci.,1926
5. BURBILL T. J. AND HANSEN R. 1917 Is symbiosis possible between legume bacteria and non-legume plants? Ill. Agr. Exp. Sta. Bull. 202 1i1 P.