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Jakobsons, A., Zell, E.A. & Wilson, P.W. A re-investigation of the calcium requirement of azotobacter vinelandii using purified media. Archiv. Mikrobiol. 41, 1–10 (1962). https://doi.org/10.1007/BF00408797
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DOI: https://doi.org/10.1007/BF00408797