1. THE TOTAL EXTRACTION OF FREE AUXIN AND AUXIN PRECURSOR FROM PLANT TISSUE
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3. Boysen Jensen, P., translated and revised by Avery, G. S., and Burkholder, P. R., Growth hormones in plants, New York (1938).
4. Chibnall, A. C., Protein metabolism in the plant, New Haven (1939).
5. Gortner, R. A., Outlines of biochemistry, New York, 2nd edition (1938).