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N. N. Shorygina and V. V. Elkin, Izv. AN SSSR, Ser. khim., 7, 1279, 1965.
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Khimiya Prirodnykh Soedinenii, Vol. 3, No. 2, pp. 143–144, 1967
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Shapiro, I.L., Pilipchuk, Y.S. & Pen, R.Z. A comparison of the Björkmann lignins from larch and fir woods. Chem Nat Compd 3, 120–121 (1967). https://doi.org/10.1007/BF00567188
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DOI: https://doi.org/10.1007/BF00567188