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3. , and Laskaris, Thomas, Proc. Nat. Acad. Sci. U. S., 28:468 (1942). 



4. Geiger, W. B., Jr. and Anderson, R. J.,/. Biol. Chem., I29(2):5i9 (1939). 



5. HiLDEBRANDT, Albert C. and Riker, a. J., Am. J. Botany, 36:74 (1949) 



6. , and Duggar, B. M., ibid., 33:591 (1946). 



7. Hodgson, Roland, Peterson, W. H., and Riker, A. J., Phytopathology, 



39:47 (1949)- 



8. , ibid., 37:301 (1947). 



9. Locke, S. B., Riker, A. J., and Duggar, B. M.,/. Agr. Res., 57:21 (1938). 



10. , ibid., 59:519 (1939)- 



11. , ibid., 59:535 (1939). 



12. Mitchell, J. E., Burris, R. H., and Riker, A. J., Am. J. Botany, 36:368 



(1949). 



13. Nagy, R., Riker, A. J., and Peterson, W. H.,/. Agr. Res., 57:545 (1938). 



14. Riker, A. J., ibid., 26:425 (1923). 



15. , Growth (Sup. to vol. 6, 4 Sym. Devlpmt. and Growth), 105 



(1942). 



16. , and Berge, T. O., Am. J. Cancer, 25:310 (1935). 



17. Riker, A. J. and Gutsche, Alice E., Am. J. Botany, 35:227 (1948). 



18. Riker, A. J., Henry, B., and Duggar, B. M.,/. Agr. Res., 63:395 (1941). 



19. Riker, A. J., Lyneis, M. M., and Locke, S. B., Phytopathology, 31:964 



(1941). 



20. Riker, A. J,, Spoerl, E., and Gutsche, Alice E., Botan. Rev., 12:57 



(1946). 



21. Sagen, H. E., Riker, A. J., and Baldwin, L L., /. Bact,, 28:571 (1934). 



22. Skoog, F., Ann. Rev. Biochem., 16:529 (1947). 



23. Thomas, John E. and Riker, A. J., (Abstract) Phytopathology, 38:26 



(1948). 



24. Wilson, A. R., Phytopathology, 25:854 (1935). 



