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2. Toxicity of Pyrrolizidine Alkaloids
3. C.C.J. Culvenor, D.T. Downing, J.A. Edgar and M.V. Jago, Annals of the New York Academy of Sciences, in press (Symposium on Biological Effects on Alkylating Agents, New York, 1968).
4. C.C.J. Culvenor, J.A. Edgar, M.V. Jago and L.W. Smith. Paper in preparation.