Loos, M. A. A study of the clover root nodule bacteria in soils of the George District. I. Serological characteristics. II. Symbiotic characteristics Sobretiro de: S. Afr. J. Agric. Science 7:135-146, 1964. LCCN: 31146 Subjects--Topical Terms: Bacterias nitrificantes.Trébol.