TY - BOOK AU - Loos, M. A. TI - A study of the clover root nodule bacteria in soils of the George District. I. Serological characteristics. II. Symbiotic characteristics KW - Bacterias nitrificantes KW - Trébol N1 - Sobretiro de: S. Afr. J. Agric. Science 7:135-146, 1964 ER -