176 LIST OF LITERATURE 



Twyman, E. S. (1943). Manganese deficiency in oats. Nature, Lond., 



152, 216. 

 Twyman, F. (1935). The Practice of Spectrum Analysis with Hilger 



Instruments, Sixth edition. London. 

 Twyman, F. (1938). Spectrochemical abstracts, 1933-7. London. 

 Twyman, F. (1938). Spectrochemical analysis in 1938. London. 



Undenas, S. (1937). Ett forsok med kopparsulfat mot gulspetssjuka. 

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Underhill, F. P. and Peterman, F. I. (1929). Studies in the meta- 

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 of aluminium in biological material. Amer. J. Physiol. 90, 1-14. 



Underwood, E. J. and Filmer, J. F. (1935). Enzootic marasmus. The 

 determination of the biologically potent element (cobalt) in limonite. 

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Underwood, E. J. and Harvey, R. J. (1938). Enzootic marasmus: 

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Van Schreven, D. A. (1934). Uitwendige en inwendige symptomen van 

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Van Schreven, D. A. (1935). Uitwendige en inwendige symptomen van 

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Van Schreven, D. A. (1939). De gezondheidstoestand van de aardap- 

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Vanselow, A. P. and Laurance, B. M. (1936). Spectrographic micro- 

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Vinogradov, A. P. (1934). Distribution of vanadium in organisms. 

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Waddell, J., Steenbock, H., Elvehjem, C. A. and Hart, E. B. (1929). 



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 Waddell, J., Steenbock, H. and Hart, E. B. (1929). Iron in nutrition. 



VIII. The ineffectiveness of high doses of iron in curing anaemia in 



the rat. J. Biol. Chem. 83, 243-50. 

 Wadleigh, C. H. and Shive, J. W. (1939). A microchemical study of 



the effect of boron deficiency in cotton seedlings. Soil Sci. 47, 33-6. 

 Walker, J. C. (1939). Internal black spot of garden beet. Phyto- 

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 Walker, J. C, Jolivette, J. P. and McLean, J. C. (1943). Boron 



deficiency in garden and sugar beet. J. Agric. Res. 66, 97-123. 

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 Walkley, A. (1942). The determination of zinc in plant materials. 



Aust. J. Exp. Biol. Med. Sci. 20, 139-47. 



