698 Marine Microbiolooy 



18. Provasoli, L.: Nutrition and ecology of protozoa and algae. Ann. Rev. 



Microbiol, 12:279-308, 1958. 



19. Provasoli, L., McLaughlin, J. J. A. and Droop, M. R.: The develop- 



ment of artificial media for marine algae. Arch. Mikrobiol., 25:392- 

 428, 1957. 



20. Starkey, R. L.: Interrelations between microorganisms and plant roots 



in the rhizosphere. Bacterial Rev., 22:154-172, 1958. 



21. Taylor, C. B. and Lochhead, A. G.: Qualitative studies of soil micro- 



organisms. II. A survey of the bacterial flora of soils differing in 

 fertility. Can. J. Res., i 6: 162-173, 1938. 



22. Waksman, S. A.: The distribution and conditions of existence of bac- 



teria in the sea. Ecol Monogr., 4:523-529, 1934. 



23. Waksman, S. A., Hotchkiss, M., Carey, C. L. and Hardman, Y.: 



Decomposition of nitrogenous substances in sea water by bacteria. 

 /. Bacterid, 35:477-486, 1938. 



24. WiNOGRADSKY, S.: Etudcs sur la microbiologic du sol. I. Sur la methode. 



Ann. Inst. Pasteur, 3,9:299-354, 1925. 



25. ZoBell, C. E.: Studies on marine bacteria, I. The cultural require- 



ments of heterotrophic aerobes. /. Mar. Res., 4:42-1^, 1941. 



26. ZoBell, C. E.: Marine Microbiology. Chronica Botanica Co. Waltham, 



Mass., 1946. 



