20 THE SOIL AND THE MICROBE 



LITERATURE 



1. Clarke, F. W. The data of geochemistry. Bulletin 695, U. S. Geological 



Survey. Washington, 1920. 



2. Glinka, K. D. The great soil groups of the world and their development. 



Transl. C. F. Marbut. Edward Bros. East Lansing, Michigan, 

 1928. 



3. HiLGARD, E. W. Soils. The Macmillan Co. New York, 1906. 



4. Lyon, T. L., and Buckm.^n, H. O. The nature and properties of soils. 



The Macmillan Co. New York, 1929. 



5. Ramann, E. The evolution and classification of soils. Transl. C. L. 



Whittles. Hetfer. Cambridge, 1928. 



6. Russell, E. J. Soil conditions and plant growth. 5th ed. Longmans, 



Green & Co. New York, 1927. 



7. WoLFANGER, L. A. The major soil divisions of the United States. J. 



Wiley & Sons. New York, 1930. 



