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Ichikawa, T., Date, M., Ishikura, T. et al. Improvement of kasugamycin-producing strain by the agar piece method and the prototroph method. Folia Microbiol 16, 218–224 (1971). https://doi.org/10.1007/BF02884210
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DOI: https://doi.org/10.1007/BF02884210