The International Standard for Oxytetracycline
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Citation
Humphrey, J. H., Lightbown, J. W., Mussett, M. V. & Perry, W. L. M. (1955). The International Standard for Oxytetracycline. Bulletin of the World Health Organization, 13 (5), 903 - 915. World Health Organization. https://iris.who.int/handle/10665/265609