References
- Alexander , M. 1961 . Introduction to Soil Microbiology , New York : John Wiley and sons .
- Buchanan , R. E. and Gibbons , N. E. 1974 . Bergey's Manual of Determinative Bacteriology , 8th edition , 450 – 456 . Baltimore : Williams and Wilkins .
- Ryter , A. and Kellenberger , E. 1958 . Etude au microscope electronique de plasmas contenant de l'acide desocyribonucleique. I. Les mucleoides des bacteries en croissance active . Zeitschrift fur Naturforschung , 13b : 597 – 605 .
- Sarathchandra , S. U. 1978 . Nitrification activities of some New Zealand soils and the effect of some clay types on nitrification . N.Z. fournal of Agricultural Research , 21 (In press)
- Schmidt , E. L. , Molina , J. A. E. and Chiang , C. 1973 . Isolation of chemoautotrophic nitrifiers from Moroccan soils . Bulletin of the Ecological Research Communications (Stockholm) , 17 : 166 – 167 .
- Soriano , S. and Walker , N. 1973 . The nitrifying bacteria in soils from Rothamsted classical fields and elsewhere . Journal of applied Bacteriology , 36 : 523 – 529 .
- Watson , S. W. 1971 . Re-isolation of Nitrosospira briensis. S. Winogradsky and H. Winogradsky . Archives of Microbiology , 75 : 179 – 188 .
- Winogradsky , S. 1892 . Contributions a la morphologie des organismes de la nitrification . Archives des Sciences biologiques (St. Petersbourg) , 1 : 87 – 137 .