Ericson, L. E. 1953a. 



On the vitamin B12-, folic acid-, and 

 folinic acid groups of factors, and on 

 the occurrence of these vitamins and 

 of niacin, pantothenic acid and amino 

 acids in a number of marine algae. 

 Thesis, Uppsala University, Sweden, 

 PP. 1-79. 



Ericson, L. E. 1953b. 



Further studies on growth factors for 

 Streptococcus faecalis and Leuconostoc 

 citrovorum in marine algae. Arkiv for 

 Kemi, Vol. 6, No. 8, pp. 503-510. 



Ericson, L. E., and Blenda Carlson. 1953- 

 Studies on the occurrence of amino 

 acids, niacin and pantothenic acid in 

 marine algae. Arkiv for Kemi, Vol. 6, 

 No. 1+9, PP- 511-522. 



Fogg, G. E. 1952. 



The production of extracellular 

 nitrogenous substances by a blue-green 

 alga. Proc. Roy. Soc, B, Vol. 139, 

 PP. 372-397. 



Hoagland, D. R., and D. I. Arnon. 1950. 



The water culture method of growing plants 

 without soil. Calif. Agr.Expt .Sta.Circ. , 

 Vol. 3V7, Revised edition. 



Johnston, R. 1955. 



Biologically active compounds in the sea. 

 Jour. Mar. Biol. Assoc. U.K., Vol. 34, 

 pp. 185-195. 



Jones, G. E. 1957- 



The effects of organic metabolites on 

 the development of marine bacteria. 

 Bacterid. Proc, pp. 16. 



Jones, G. E., W. H. Thomas, and F. T. Haxo. 

 Preliminary studies of bacterial 

 growth in relation to dark and light 

 fixation of C ll4 02 during productivity 

 determinations, (this volume). 



Lewin, R. A. 195 1 *-- 



A marine Stichococcus sp. which requires 

 Vitamin B]_2 (cobalamin). Jour. Gen. 

 Microbiol., Vol. 10, pp. 93-96. 



Lucas, C. E. 19^7. 



The ecological effects of external 

 metabolites. Biol. Rev., Vol.22, pp. 270-295. 



Lucas, C. E. I9I4-9 . 



External metabolites and ecological 

 adaptation. Symp.Soc .Expt .Biol., Vol. 3, 

 PP. 336-356. 



Lucas, C. E. 1955. 



External metabolites in the sea. Mar. 

 Biol, and Oceanogr. Suppl. to Vol. 3 of 

 Deep-Sea Res., pp. 139-148. 



MacLeod, R. A., E. Onofrey, and M. E. Norris. 1954 

 Nutrition and metabolism of marine bacteria. 

 I. Survey of nutritional requirements. 

 Jour .Bacterid., Vol. 68, pp.680-686. 



Oppenheimer, C. H., and C. E. Zobell. 1952. 

 The growth and viability of sixty-three 

 species of marine bacteria as influenced 

 by hydrostatic pressure. Jour .Mar .Res . , 

 Vol.1, No.l, pp. 10-18. 



Ostroff, Rose, and B. S. Henry. 1939. 

 The utilization of various nitrogen 

 compounds by marine bacteria. Jour .Cellular 

 Comp. Physiol., Vol.13, pp. 353-371- 



Provasoli, L., and Irma J. Pintner. 1953. 

 Ecological implications of in vitro 

 nutritional requirements of algal flagel- 

 lates. Ann. N.Y. Acad.Sci. , Vol. 56, No. 5, 

 pp. 839-851. 



Provasoli, L., J. J. A. McLaughlin and 



M. R. Droop.' 1957. 



The development of artificial media for 

 marine algae. Archiv. fur Microbiol., 

 Vol.25, pp. 392-428. 



Steemann Nielsen, E. 1951. 



Measurement of the production of organic 

 matter in the sea by means of carbon-l4. 

 Nature (London), Vol.167, p. 684. 



Steemann Nielsen, E. 1952. 



The use of radioactive carbon (C 1 ^) for 

 measuring the organic production of carbon 

 in the sea. Jour .Cons. Int. Explor.Mer. , 

 Vol.18, No. 2, pp. 117-140. 



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