REFERENCES
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- Von Brand, T., and Files, V. S. (1947). Chemical and histological observations on the influence of Schistosoma mansoni infection on Australorbis glabratus. J. Parasit., 33, 476.
- Robinson, D. L. H. (1961). Avian schistosomes in Hertfordshire. Nature, Lond., 190, 827.
- Robinson, D. L. H. and Targett, G. A. T. (1962). Separation of amino-acids by circular paper chromatography. Ibid., 194, 30.
- Standen, O. D. (1951). Some observations upon the maintenance of Australorbis glabratus in the laboratory. Ann. trop. Med. Parasit., 45, 80.
- Targett, G. A. T. (1962). The amino-acid composition of blood from snail hosts of schistosomiasis. Ibid., 56, 61.