60 Marine Microbiology 



17. Richards, F. A. and Benson, B. B.: Nitrogen/argon and nitrogen iso- 



tope ratios in anerobic marine environments. Inter Oceanogr. Cong. 

 Preprints, 896-897, 1959. 



18. Riley, G. A.: The carbon metabolism and photosynthetic efficiency of 



the earth as a whole. Am. Sci., 32:129-134, 1944. 



19. Riley, G. A.: Oxygen, phosphate, and nitrate in the Atlantic Ocean. 



Bull. Bingham Oceanog. Coll., 13:1-126, 1951. 



20. Rittenberg, S. C., Emery, K. O. and Orr, W. L.: Regeneration of nu- 



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21. RussEL, H. L.: Untersuchungen iiber im Golf von Neapel lebende 



Bakterien. Zeit. Hijg., JI:165-206, 1891. 



22. Skerman, T. M.: Nutritional patterns in marine bacterial populations 



(this symposium Chapter 64) 1962. 



23. Skerman, V. B. D. and MacRae, I. C.: The influence of oxygen on the 



reduction of nitrate by adapted cells of Pseiidomonas denitrificans. 

 Can. J. Microb., 3:216, 1957. 



24. Steemann-Nielsen, E.: On organic production in the oceans. /. 



Conseil Int. Explor. de la Mer., 79:309-328, 1954. 



25. Trask, p. D.: Organic content of recent marine sediments. In Recent 



Marine Sediments. Thos. Murby and Co., Tulsa, 1939, pp. 428-453. 



26. Waksman, S. a., Hotchkiss, M. and Carey, C. L.: Marine bacteria and 



their role in tlie cycle of life in the sea, II. Bacteria concerned with 

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27. Watson, S. W.: Autotrophic nitrification in the oceans (this sympo- 



sium Chapter 7) 1962. 



28. Winogradsky, S.: Sur les organismes de la nitrification. Compt. rend. 



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29. Winogradsky, S.: The direct method in soil microbiology and its 



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30. VON Wollny, E.: Ueber die Thatigkeit mehrerer Organismen in der 



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31. ZoBell, C. E.: The effect of oxygen tension on the rate of oxidation of 



organic matter in sea water by bacteria. /. Mar. Res., 3:211-223, 

 1940. 



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



Mass., 1946. 240 pp. 



