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Paul R. Burkholder, Sung Huang Sun, Lucia E. Anderson, John Ehrlich, The Identity of Viomycin-Producing Cultures of Streptomyces, Bulletin of the Torrey Botanical Club, Vol. 82, No. 2 (Mar. - Apr., 1955), pp. 108-117
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Burkholder et al. (1955) studied this question.
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