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The International collaborative study on the first proposed international standard of birch (‎betula verrucosa pollen extract / by F. C. Arntzen ... [‎et al.]‎

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Arntzen, F. C, Wilhelmsen, T. W, Lowenstein, Henning, Gjesing, B, Maasch, H. J. et al. (‎1986)‎. The International collaborative study on the first proposed international standard of birch (‎betula verrucosa pollen extract / by F. C. Arntzen ... [‎et al.]‎. World Health Organization. https://apps.who.int/iris/handle/10665/61961
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WHO/BS/86.1512. Unpublished
43 p.
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WHO/BS/86.1512. Unpublished
Language
English
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